1ccd979bdSMark Fasheh /* -*- mode: c; c-basic-offset: 8; -*- 2ccd979bdSMark Fasheh * vim: noexpandtab sw=8 ts=8 sts=0: 3ccd979bdSMark Fasheh * 4ccd979bdSMark Fasheh * dlmglue.c 5ccd979bdSMark Fasheh * 6ccd979bdSMark Fasheh * Code which implements an OCFS2 specific interface to our DLM. 7ccd979bdSMark Fasheh * 8ccd979bdSMark Fasheh * Copyright (C) 2003, 2004 Oracle. All rights reserved. 9ccd979bdSMark Fasheh * 10ccd979bdSMark Fasheh * This program is free software; you can redistribute it and/or 11ccd979bdSMark Fasheh * modify it under the terms of the GNU General Public 12ccd979bdSMark Fasheh * License as published by the Free Software Foundation; either 13ccd979bdSMark Fasheh * version 2 of the License, or (at your option) any later version. 14ccd979bdSMark Fasheh * 15ccd979bdSMark Fasheh * This program is distributed in the hope that it will be useful, 16ccd979bdSMark Fasheh * but WITHOUT ANY WARRANTY; without even the implied warranty of 17ccd979bdSMark Fasheh * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 18ccd979bdSMark Fasheh * General Public License for more details. 19ccd979bdSMark Fasheh * 20ccd979bdSMark Fasheh * You should have received a copy of the GNU General Public 21ccd979bdSMark Fasheh * License along with this program; if not, write to the 22ccd979bdSMark Fasheh * Free Software Foundation, Inc., 59 Temple Place - Suite 330, 23ccd979bdSMark Fasheh * Boston, MA 021110-1307, USA. 24ccd979bdSMark Fasheh */ 25ccd979bdSMark Fasheh 26ccd979bdSMark Fasheh #include <linux/types.h> 27ccd979bdSMark Fasheh #include <linux/slab.h> 28ccd979bdSMark Fasheh #include <linux/highmem.h> 29ccd979bdSMark Fasheh #include <linux/mm.h> 30ccd979bdSMark Fasheh #include <linux/smp_lock.h> 31ccd979bdSMark Fasheh #include <linux/crc32.h> 32ccd979bdSMark Fasheh #include <linux/kthread.h> 33ccd979bdSMark Fasheh #include <linux/pagemap.h> 34ccd979bdSMark Fasheh #include <linux/debugfs.h> 35ccd979bdSMark Fasheh #include <linux/seq_file.h> 36ccd979bdSMark Fasheh 37ccd979bdSMark Fasheh #include <cluster/heartbeat.h> 38ccd979bdSMark Fasheh #include <cluster/nodemanager.h> 39ccd979bdSMark Fasheh #include <cluster/tcp.h> 40ccd979bdSMark Fasheh 41ccd979bdSMark Fasheh #include <dlm/dlmapi.h> 42ccd979bdSMark Fasheh 43ccd979bdSMark Fasheh #define MLOG_MASK_PREFIX ML_DLM_GLUE 44ccd979bdSMark Fasheh #include <cluster/masklog.h> 45ccd979bdSMark Fasheh 46ccd979bdSMark Fasheh #include "ocfs2.h" 47ccd979bdSMark Fasheh 48ccd979bdSMark Fasheh #include "alloc.h" 49d680efe9SMark Fasheh #include "dcache.h" 50ccd979bdSMark Fasheh #include "dlmglue.h" 51ccd979bdSMark Fasheh #include "extent_map.h" 52ccd979bdSMark Fasheh #include "heartbeat.h" 53ccd979bdSMark Fasheh #include "inode.h" 54ccd979bdSMark Fasheh #include "journal.h" 55ccd979bdSMark Fasheh #include "slot_map.h" 56ccd979bdSMark Fasheh #include "super.h" 57ccd979bdSMark Fasheh #include "uptodate.h" 58ccd979bdSMark Fasheh #include "vote.h" 59ccd979bdSMark Fasheh 60ccd979bdSMark Fasheh #include "buffer_head_io.h" 61ccd979bdSMark Fasheh 62ccd979bdSMark Fasheh struct ocfs2_mask_waiter { 63ccd979bdSMark Fasheh struct list_head mw_item; 64ccd979bdSMark Fasheh int mw_status; 65ccd979bdSMark Fasheh struct completion mw_complete; 66ccd979bdSMark Fasheh unsigned long mw_mask; 67ccd979bdSMark Fasheh unsigned long mw_goal; 68ccd979bdSMark Fasheh }; 69ccd979bdSMark Fasheh 70ccd979bdSMark Fasheh static void ocfs2_inode_ast_func(void *opaque); 71ccd979bdSMark Fasheh static void ocfs2_inode_bast_func(void *opaque, 72ccd979bdSMark Fasheh int level); 73d680efe9SMark Fasheh static void ocfs2_dentry_ast_func(void *opaque); 74d680efe9SMark Fasheh static void ocfs2_dentry_bast_func(void *opaque, 75d680efe9SMark Fasheh int level); 76ccd979bdSMark Fasheh static void ocfs2_super_ast_func(void *opaque); 77ccd979bdSMark Fasheh static void ocfs2_super_bast_func(void *opaque, 78ccd979bdSMark Fasheh int level); 79ccd979bdSMark Fasheh static void ocfs2_rename_ast_func(void *opaque); 80ccd979bdSMark Fasheh static void ocfs2_rename_bast_func(void *opaque, 81ccd979bdSMark Fasheh int level); 82ccd979bdSMark Fasheh 83d680efe9SMark Fasheh /* 84d680efe9SMark Fasheh * Return value from ocfs2_convert_worker_t functions. 85d680efe9SMark Fasheh * 86d680efe9SMark Fasheh * These control the precise actions of ocfs2_generic_unblock_lock() 87d680efe9SMark Fasheh * and ocfs2_process_blocked_lock() 88d680efe9SMark Fasheh * 89d680efe9SMark Fasheh */ 90d680efe9SMark Fasheh enum ocfs2_unblock_action { 91d680efe9SMark Fasheh UNBLOCK_CONTINUE = 0, /* Continue downconvert */ 92d680efe9SMark Fasheh UNBLOCK_CONTINUE_POST = 1, /* Continue downconvert, fire 93d680efe9SMark Fasheh * ->post_unlock callback */ 94d680efe9SMark Fasheh UNBLOCK_STOP_POST = 2, /* Do not downconvert, fire 95d680efe9SMark Fasheh * ->post_unlock() callback. */ 96d680efe9SMark Fasheh }; 97d680efe9SMark Fasheh 98d680efe9SMark Fasheh struct ocfs2_unblock_ctl { 99d680efe9SMark Fasheh int requeue; 100d680efe9SMark Fasheh enum ocfs2_unblock_action unblock_action; 101d680efe9SMark Fasheh }; 102d680efe9SMark Fasheh 103ccd979bdSMark Fasheh /* so far, all locks have gotten along with the same unlock ast */ 104ccd979bdSMark Fasheh static void ocfs2_unlock_ast_func(void *opaque, 105ccd979bdSMark Fasheh enum dlm_status status); 106ccd979bdSMark Fasheh static int ocfs2_unblock_meta(struct ocfs2_lock_res *lockres, 107d680efe9SMark Fasheh struct ocfs2_unblock_ctl *ctl); 108ccd979bdSMark Fasheh static int ocfs2_unblock_data(struct ocfs2_lock_res *lockres, 109d680efe9SMark Fasheh struct ocfs2_unblock_ctl *ctl); 110ccd979bdSMark Fasheh static int ocfs2_unblock_inode_lock(struct ocfs2_lock_res *lockres, 111d680efe9SMark Fasheh struct ocfs2_unblock_ctl *ctl); 112d680efe9SMark Fasheh static int ocfs2_unblock_dentry_lock(struct ocfs2_lock_res *lockres, 113d680efe9SMark Fasheh struct ocfs2_unblock_ctl *ctl); 114ccd979bdSMark Fasheh static int ocfs2_unblock_osb_lock(struct ocfs2_lock_res *lockres, 115d680efe9SMark Fasheh struct ocfs2_unblock_ctl *ctl); 116d680efe9SMark Fasheh 117d680efe9SMark Fasheh static void ocfs2_dentry_post_unlock(struct ocfs2_super *osb, 118d680efe9SMark Fasheh struct ocfs2_lock_res *lockres); 119ccd979bdSMark Fasheh 120f625c979SMark Fasheh /* 121f625c979SMark Fasheh * OCFS2 Lock Resource Operations 122f625c979SMark Fasheh * 123f625c979SMark Fasheh * These fine tune the behavior of the generic dlmglue locking infrastructure. 124f625c979SMark Fasheh */ 125ccd979bdSMark Fasheh struct ocfs2_lock_res_ops { 126ccd979bdSMark Fasheh void (*ast)(void *); 127ccd979bdSMark Fasheh void (*bast)(void *, int); 128ccd979bdSMark Fasheh void (*unlock_ast)(void *, enum dlm_status); 129d680efe9SMark Fasheh int (*unblock)(struct ocfs2_lock_res *, struct ocfs2_unblock_ctl *); 130d680efe9SMark Fasheh void (*post_unlock)(struct ocfs2_super *, struct ocfs2_lock_res *); 131f625c979SMark Fasheh 132f625c979SMark Fasheh /* 133f625c979SMark Fasheh * LOCK_TYPE_* flags which describe the specific requirements 134f625c979SMark Fasheh * of a lock type. Descriptions of each individual flag follow. 135f625c979SMark Fasheh */ 136f625c979SMark Fasheh int flags; 137ccd979bdSMark Fasheh }; 138ccd979bdSMark Fasheh 139f625c979SMark Fasheh /* 140f625c979SMark Fasheh * Some locks want to "refresh" potentially stale data when a 141f625c979SMark Fasheh * meaningful (PRMODE or EXMODE) lock level is first obtained. If this 142f625c979SMark Fasheh * flag is set, the OCFS2_LOCK_NEEDS_REFRESH flag will be set on the 143f625c979SMark Fasheh * individual lockres l_flags member from the ast function. It is 144f625c979SMark Fasheh * expected that the locking wrapper will clear the 145f625c979SMark Fasheh * OCFS2_LOCK_NEEDS_REFRESH flag when done. 146f625c979SMark Fasheh */ 147f625c979SMark Fasheh #define LOCK_TYPE_REQUIRES_REFRESH 0x1 148f625c979SMark Fasheh 149d680efe9SMark Fasheh typedef int (ocfs2_convert_worker_t)(struct ocfs2_lock_res *, int); 150d680efe9SMark Fasheh static int ocfs2_generic_unblock_lock(struct ocfs2_super *osb, 151d680efe9SMark Fasheh struct ocfs2_lock_res *lockres, 152d680efe9SMark Fasheh struct ocfs2_unblock_ctl *ctl, 153d680efe9SMark Fasheh ocfs2_convert_worker_t *worker); 154d680efe9SMark Fasheh 155ccd979bdSMark Fasheh static struct ocfs2_lock_res_ops ocfs2_inode_rw_lops = { 156ccd979bdSMark Fasheh .ast = ocfs2_inode_ast_func, 157ccd979bdSMark Fasheh .bast = ocfs2_inode_bast_func, 158ccd979bdSMark Fasheh .unlock_ast = ocfs2_unlock_ast_func, 159ccd979bdSMark Fasheh .unblock = ocfs2_unblock_inode_lock, 160f625c979SMark Fasheh .flags = 0, 161ccd979bdSMark Fasheh }; 162ccd979bdSMark Fasheh 163ccd979bdSMark Fasheh static struct ocfs2_lock_res_ops ocfs2_inode_meta_lops = { 164ccd979bdSMark Fasheh .ast = ocfs2_inode_ast_func, 165ccd979bdSMark Fasheh .bast = ocfs2_inode_bast_func, 166ccd979bdSMark Fasheh .unlock_ast = ocfs2_unlock_ast_func, 167ccd979bdSMark Fasheh .unblock = ocfs2_unblock_meta, 168f625c979SMark Fasheh .flags = LOCK_TYPE_REQUIRES_REFRESH, 169ccd979bdSMark Fasheh }; 170ccd979bdSMark Fasheh 171ccd979bdSMark Fasheh static struct ocfs2_lock_res_ops ocfs2_inode_data_lops = { 172ccd979bdSMark Fasheh .ast = ocfs2_inode_ast_func, 173ccd979bdSMark Fasheh .bast = ocfs2_inode_bast_func, 174ccd979bdSMark Fasheh .unlock_ast = ocfs2_unlock_ast_func, 175ccd979bdSMark Fasheh .unblock = ocfs2_unblock_data, 176f625c979SMark Fasheh .flags = 0, 177ccd979bdSMark Fasheh }; 178ccd979bdSMark Fasheh 179ccd979bdSMark Fasheh static struct ocfs2_lock_res_ops ocfs2_super_lops = { 180ccd979bdSMark Fasheh .ast = ocfs2_super_ast_func, 181ccd979bdSMark Fasheh .bast = ocfs2_super_bast_func, 182ccd979bdSMark Fasheh .unlock_ast = ocfs2_unlock_ast_func, 183ccd979bdSMark Fasheh .unblock = ocfs2_unblock_osb_lock, 184f625c979SMark Fasheh .flags = LOCK_TYPE_REQUIRES_REFRESH, 185ccd979bdSMark Fasheh }; 186ccd979bdSMark Fasheh 187ccd979bdSMark Fasheh static struct ocfs2_lock_res_ops ocfs2_rename_lops = { 188ccd979bdSMark Fasheh .ast = ocfs2_rename_ast_func, 189ccd979bdSMark Fasheh .bast = ocfs2_rename_bast_func, 190ccd979bdSMark Fasheh .unlock_ast = ocfs2_unlock_ast_func, 191ccd979bdSMark Fasheh .unblock = ocfs2_unblock_osb_lock, 192f625c979SMark Fasheh .flags = 0, 193ccd979bdSMark Fasheh }; 194ccd979bdSMark Fasheh 195d680efe9SMark Fasheh static struct ocfs2_lock_res_ops ocfs2_dentry_lops = { 196d680efe9SMark Fasheh .ast = ocfs2_dentry_ast_func, 197d680efe9SMark Fasheh .bast = ocfs2_dentry_bast_func, 198d680efe9SMark Fasheh .unlock_ast = ocfs2_unlock_ast_func, 199d680efe9SMark Fasheh .unblock = ocfs2_unblock_dentry_lock, 200d680efe9SMark Fasheh .post_unlock = ocfs2_dentry_post_unlock, 201f625c979SMark Fasheh .flags = 0, 202d680efe9SMark Fasheh }; 203d680efe9SMark Fasheh 204ccd979bdSMark Fasheh static inline int ocfs2_is_inode_lock(struct ocfs2_lock_res *lockres) 205ccd979bdSMark Fasheh { 206ccd979bdSMark Fasheh return lockres->l_type == OCFS2_LOCK_TYPE_META || 207ccd979bdSMark Fasheh lockres->l_type == OCFS2_LOCK_TYPE_DATA || 208ccd979bdSMark Fasheh lockres->l_type == OCFS2_LOCK_TYPE_RW; 209ccd979bdSMark Fasheh } 210ccd979bdSMark Fasheh 211ccd979bdSMark Fasheh static inline int ocfs2_is_super_lock(struct ocfs2_lock_res *lockres) 212ccd979bdSMark Fasheh { 213ccd979bdSMark Fasheh return lockres->l_type == OCFS2_LOCK_TYPE_SUPER; 214ccd979bdSMark Fasheh } 215ccd979bdSMark Fasheh 216ccd979bdSMark Fasheh static inline int ocfs2_is_rename_lock(struct ocfs2_lock_res *lockres) 217ccd979bdSMark Fasheh { 218ccd979bdSMark Fasheh return lockres->l_type == OCFS2_LOCK_TYPE_RENAME; 219ccd979bdSMark Fasheh } 220ccd979bdSMark Fasheh 221ccd979bdSMark Fasheh static inline struct ocfs2_super *ocfs2_lock_res_super(struct ocfs2_lock_res *lockres) 222ccd979bdSMark Fasheh { 223ccd979bdSMark Fasheh BUG_ON(!ocfs2_is_super_lock(lockres) 224ccd979bdSMark Fasheh && !ocfs2_is_rename_lock(lockres)); 225ccd979bdSMark Fasheh 226ccd979bdSMark Fasheh return (struct ocfs2_super *) lockres->l_priv; 227ccd979bdSMark Fasheh } 228ccd979bdSMark Fasheh 229ccd979bdSMark Fasheh static inline struct inode *ocfs2_lock_res_inode(struct ocfs2_lock_res *lockres) 230ccd979bdSMark Fasheh { 231ccd979bdSMark Fasheh BUG_ON(!ocfs2_is_inode_lock(lockres)); 232ccd979bdSMark Fasheh 233ccd979bdSMark Fasheh return (struct inode *) lockres->l_priv; 234ccd979bdSMark Fasheh } 235ccd979bdSMark Fasheh 236d680efe9SMark Fasheh static inline struct ocfs2_dentry_lock *ocfs2_lock_res_dl(struct ocfs2_lock_res *lockres) 237d680efe9SMark Fasheh { 238d680efe9SMark Fasheh BUG_ON(lockres->l_type != OCFS2_LOCK_TYPE_DENTRY); 239d680efe9SMark Fasheh 240d680efe9SMark Fasheh return (struct ocfs2_dentry_lock *)lockres->l_priv; 241d680efe9SMark Fasheh } 242d680efe9SMark Fasheh 243ccd979bdSMark Fasheh static int ocfs2_lock_create(struct ocfs2_super *osb, 244ccd979bdSMark Fasheh struct ocfs2_lock_res *lockres, 245ccd979bdSMark Fasheh int level, 246ccd979bdSMark Fasheh int dlm_flags); 247ccd979bdSMark Fasheh static inline int ocfs2_may_continue_on_blocked_lock(struct ocfs2_lock_res *lockres, 248ccd979bdSMark Fasheh int wanted); 249ccd979bdSMark Fasheh static void ocfs2_cluster_unlock(struct ocfs2_super *osb, 250ccd979bdSMark Fasheh struct ocfs2_lock_res *lockres, 251ccd979bdSMark Fasheh int level); 252ccd979bdSMark Fasheh static inline void ocfs2_generic_handle_downconvert_action(struct ocfs2_lock_res *lockres); 253ccd979bdSMark Fasheh static inline void ocfs2_generic_handle_convert_action(struct ocfs2_lock_res *lockres); 254ccd979bdSMark Fasheh static inline void ocfs2_generic_handle_attach_action(struct ocfs2_lock_res *lockres); 255ccd979bdSMark Fasheh static int ocfs2_generic_handle_bast(struct ocfs2_lock_res *lockres, int level); 256ccd979bdSMark Fasheh static void ocfs2_schedule_blocked_lock(struct ocfs2_super *osb, 257ccd979bdSMark Fasheh struct ocfs2_lock_res *lockres); 258ccd979bdSMark Fasheh static inline void ocfs2_recover_from_dlm_error(struct ocfs2_lock_res *lockres, 259ccd979bdSMark Fasheh int convert); 260ccd979bdSMark Fasheh #define ocfs2_log_dlm_error(_func, _stat, _lockres) do { \ 261ccd979bdSMark Fasheh mlog(ML_ERROR, "Dlm error \"%s\" while calling %s on " \ 262ccd979bdSMark Fasheh "resource %s: %s\n", dlm_errname(_stat), _func, \ 263ccd979bdSMark Fasheh _lockres->l_name, dlm_errmsg(_stat)); \ 264ccd979bdSMark Fasheh } while (0) 265ccd979bdSMark Fasheh static void ocfs2_vote_on_unlock(struct ocfs2_super *osb, 266ccd979bdSMark Fasheh struct ocfs2_lock_res *lockres); 267ccd979bdSMark Fasheh static int ocfs2_meta_lock_update(struct inode *inode, 268ccd979bdSMark Fasheh struct buffer_head **bh); 269ccd979bdSMark Fasheh static void ocfs2_drop_osb_locks(struct ocfs2_super *osb); 270ccd979bdSMark Fasheh static inline int ocfs2_highest_compat_lock_level(int level); 271ccd979bdSMark Fasheh static inline int ocfs2_can_downconvert_meta_lock(struct inode *inode, 272ccd979bdSMark Fasheh struct ocfs2_lock_res *lockres, 273ccd979bdSMark Fasheh int new_level); 274ccd979bdSMark Fasheh 275ccd979bdSMark Fasheh static void ocfs2_build_lock_name(enum ocfs2_lock_type type, 276ccd979bdSMark Fasheh u64 blkno, 277ccd979bdSMark Fasheh u32 generation, 278ccd979bdSMark Fasheh char *name) 279ccd979bdSMark Fasheh { 280ccd979bdSMark Fasheh int len; 281ccd979bdSMark Fasheh 282ccd979bdSMark Fasheh mlog_entry_void(); 283ccd979bdSMark Fasheh 284ccd979bdSMark Fasheh BUG_ON(type >= OCFS2_NUM_LOCK_TYPES); 285ccd979bdSMark Fasheh 286b0697053SMark Fasheh len = snprintf(name, OCFS2_LOCK_ID_MAX_LEN, "%c%s%016llx%08x", 287b0697053SMark Fasheh ocfs2_lock_type_char(type), OCFS2_LOCK_ID_PAD, 288b0697053SMark Fasheh (long long)blkno, generation); 289ccd979bdSMark Fasheh 290ccd979bdSMark Fasheh BUG_ON(len != (OCFS2_LOCK_ID_MAX_LEN - 1)); 291ccd979bdSMark Fasheh 292ccd979bdSMark Fasheh mlog(0, "built lock resource with name: %s\n", name); 293ccd979bdSMark Fasheh 294ccd979bdSMark Fasheh mlog_exit_void(); 295ccd979bdSMark Fasheh } 296ccd979bdSMark Fasheh 29734af946aSIngo Molnar static DEFINE_SPINLOCK(ocfs2_dlm_tracking_lock); 298ccd979bdSMark Fasheh 299ccd979bdSMark Fasheh static void ocfs2_add_lockres_tracking(struct ocfs2_lock_res *res, 300ccd979bdSMark Fasheh struct ocfs2_dlm_debug *dlm_debug) 301ccd979bdSMark Fasheh { 302ccd979bdSMark Fasheh mlog(0, "Add tracking for lockres %s\n", res->l_name); 303ccd979bdSMark Fasheh 304ccd979bdSMark Fasheh spin_lock(&ocfs2_dlm_tracking_lock); 305ccd979bdSMark Fasheh list_add(&res->l_debug_list, &dlm_debug->d_lockres_tracking); 306ccd979bdSMark Fasheh spin_unlock(&ocfs2_dlm_tracking_lock); 307ccd979bdSMark Fasheh } 308ccd979bdSMark Fasheh 309ccd979bdSMark Fasheh static void ocfs2_remove_lockres_tracking(struct ocfs2_lock_res *res) 310ccd979bdSMark Fasheh { 311ccd979bdSMark Fasheh spin_lock(&ocfs2_dlm_tracking_lock); 312ccd979bdSMark Fasheh if (!list_empty(&res->l_debug_list)) 313ccd979bdSMark Fasheh list_del_init(&res->l_debug_list); 314ccd979bdSMark Fasheh spin_unlock(&ocfs2_dlm_tracking_lock); 315ccd979bdSMark Fasheh } 316ccd979bdSMark Fasheh 317ccd979bdSMark Fasheh static void ocfs2_lock_res_init_common(struct ocfs2_super *osb, 318ccd979bdSMark Fasheh struct ocfs2_lock_res *res, 319ccd979bdSMark Fasheh enum ocfs2_lock_type type, 320ccd979bdSMark Fasheh struct ocfs2_lock_res_ops *ops, 321ccd979bdSMark Fasheh void *priv) 322ccd979bdSMark Fasheh { 323ccd979bdSMark Fasheh res->l_type = type; 324ccd979bdSMark Fasheh res->l_ops = ops; 325ccd979bdSMark Fasheh res->l_priv = priv; 326ccd979bdSMark Fasheh 327ccd979bdSMark Fasheh res->l_level = LKM_IVMODE; 328ccd979bdSMark Fasheh res->l_requested = LKM_IVMODE; 329ccd979bdSMark Fasheh res->l_blocking = LKM_IVMODE; 330ccd979bdSMark Fasheh res->l_action = OCFS2_AST_INVALID; 331ccd979bdSMark Fasheh res->l_unlock_action = OCFS2_UNLOCK_INVALID; 332ccd979bdSMark Fasheh 333ccd979bdSMark Fasheh res->l_flags = OCFS2_LOCK_INITIALIZED; 334ccd979bdSMark Fasheh 335ccd979bdSMark Fasheh ocfs2_add_lockres_tracking(res, osb->osb_dlm_debug); 336ccd979bdSMark Fasheh } 337ccd979bdSMark Fasheh 338ccd979bdSMark Fasheh void ocfs2_lock_res_init_once(struct ocfs2_lock_res *res) 339ccd979bdSMark Fasheh { 340ccd979bdSMark Fasheh /* This also clears out the lock status block */ 341ccd979bdSMark Fasheh memset(res, 0, sizeof(struct ocfs2_lock_res)); 342ccd979bdSMark Fasheh spin_lock_init(&res->l_lock); 343ccd979bdSMark Fasheh init_waitqueue_head(&res->l_event); 344ccd979bdSMark Fasheh INIT_LIST_HEAD(&res->l_blocked_list); 345ccd979bdSMark Fasheh INIT_LIST_HEAD(&res->l_mask_waiters); 346ccd979bdSMark Fasheh } 347ccd979bdSMark Fasheh 348ccd979bdSMark Fasheh void ocfs2_inode_lock_res_init(struct ocfs2_lock_res *res, 349ccd979bdSMark Fasheh enum ocfs2_lock_type type, 35024c19ef4SMark Fasheh unsigned int generation, 351ccd979bdSMark Fasheh struct inode *inode) 352ccd979bdSMark Fasheh { 353ccd979bdSMark Fasheh struct ocfs2_lock_res_ops *ops; 354ccd979bdSMark Fasheh 355ccd979bdSMark Fasheh switch(type) { 356ccd979bdSMark Fasheh case OCFS2_LOCK_TYPE_RW: 357ccd979bdSMark Fasheh ops = &ocfs2_inode_rw_lops; 358ccd979bdSMark Fasheh break; 359ccd979bdSMark Fasheh case OCFS2_LOCK_TYPE_META: 360ccd979bdSMark Fasheh ops = &ocfs2_inode_meta_lops; 361ccd979bdSMark Fasheh break; 362ccd979bdSMark Fasheh case OCFS2_LOCK_TYPE_DATA: 363ccd979bdSMark Fasheh ops = &ocfs2_inode_data_lops; 364ccd979bdSMark Fasheh break; 365ccd979bdSMark Fasheh default: 366ccd979bdSMark Fasheh mlog_bug_on_msg(1, "type: %d\n", type); 367ccd979bdSMark Fasheh ops = NULL; /* thanks, gcc */ 368ccd979bdSMark Fasheh break; 369ccd979bdSMark Fasheh }; 370ccd979bdSMark Fasheh 371d680efe9SMark Fasheh ocfs2_build_lock_name(type, OCFS2_I(inode)->ip_blkno, 37224c19ef4SMark Fasheh generation, res->l_name); 373d680efe9SMark Fasheh ocfs2_lock_res_init_common(OCFS2_SB(inode->i_sb), res, type, ops, inode); 374d680efe9SMark Fasheh } 375d680efe9SMark Fasheh 376d680efe9SMark Fasheh static __u64 ocfs2_get_dentry_lock_ino(struct ocfs2_lock_res *lockres) 377d680efe9SMark Fasheh { 378d680efe9SMark Fasheh __be64 inode_blkno_be; 379d680efe9SMark Fasheh 380d680efe9SMark Fasheh memcpy(&inode_blkno_be, &lockres->l_name[OCFS2_DENTRY_LOCK_INO_START], 381d680efe9SMark Fasheh sizeof(__be64)); 382d680efe9SMark Fasheh 383d680efe9SMark Fasheh return be64_to_cpu(inode_blkno_be); 384d680efe9SMark Fasheh } 385d680efe9SMark Fasheh 386d680efe9SMark Fasheh void ocfs2_dentry_lock_res_init(struct ocfs2_dentry_lock *dl, 387d680efe9SMark Fasheh u64 parent, struct inode *inode) 388d680efe9SMark Fasheh { 389d680efe9SMark Fasheh int len; 390d680efe9SMark Fasheh u64 inode_blkno = OCFS2_I(inode)->ip_blkno; 391d680efe9SMark Fasheh __be64 inode_blkno_be = cpu_to_be64(inode_blkno); 392d680efe9SMark Fasheh struct ocfs2_lock_res *lockres = &dl->dl_lockres; 393d680efe9SMark Fasheh 394d680efe9SMark Fasheh ocfs2_lock_res_init_once(lockres); 395d680efe9SMark Fasheh 396d680efe9SMark Fasheh /* 397d680efe9SMark Fasheh * Unfortunately, the standard lock naming scheme won't work 398d680efe9SMark Fasheh * here because we have two 16 byte values to use. Instead, 399d680efe9SMark Fasheh * we'll stuff the inode number as a binary value. We still 400d680efe9SMark Fasheh * want error prints to show something without garbling the 401d680efe9SMark Fasheh * display, so drop a null byte in there before the inode 402d680efe9SMark Fasheh * number. A future version of OCFS2 will likely use all 403d680efe9SMark Fasheh * binary lock names. The stringified names have been a 404d680efe9SMark Fasheh * tremendous aid in debugging, but now that the debugfs 405d680efe9SMark Fasheh * interface exists, we can mangle things there if need be. 406d680efe9SMark Fasheh * 407d680efe9SMark Fasheh * NOTE: We also drop the standard "pad" value (the total lock 408d680efe9SMark Fasheh * name size stays the same though - the last part is all 409d680efe9SMark Fasheh * zeros due to the memset in ocfs2_lock_res_init_once() 410d680efe9SMark Fasheh */ 411d680efe9SMark Fasheh len = snprintf(lockres->l_name, OCFS2_DENTRY_LOCK_INO_START, 412d680efe9SMark Fasheh "%c%016llx", 413d680efe9SMark Fasheh ocfs2_lock_type_char(OCFS2_LOCK_TYPE_DENTRY), 414d680efe9SMark Fasheh (long long)parent); 415d680efe9SMark Fasheh 416d680efe9SMark Fasheh BUG_ON(len != (OCFS2_DENTRY_LOCK_INO_START - 1)); 417d680efe9SMark Fasheh 418d680efe9SMark Fasheh memcpy(&lockres->l_name[OCFS2_DENTRY_LOCK_INO_START], &inode_blkno_be, 419d680efe9SMark Fasheh sizeof(__be64)); 420d680efe9SMark Fasheh 421d680efe9SMark Fasheh ocfs2_lock_res_init_common(OCFS2_SB(inode->i_sb), lockres, 422d680efe9SMark Fasheh OCFS2_LOCK_TYPE_DENTRY, &ocfs2_dentry_lops, 423d680efe9SMark Fasheh dl); 424ccd979bdSMark Fasheh } 425ccd979bdSMark Fasheh 426ccd979bdSMark Fasheh static void ocfs2_super_lock_res_init(struct ocfs2_lock_res *res, 427ccd979bdSMark Fasheh struct ocfs2_super *osb) 428ccd979bdSMark Fasheh { 429ccd979bdSMark Fasheh /* Superblock lockres doesn't come from a slab so we call init 430ccd979bdSMark Fasheh * once on it manually. */ 431ccd979bdSMark Fasheh ocfs2_lock_res_init_once(res); 432d680efe9SMark Fasheh ocfs2_build_lock_name(OCFS2_LOCK_TYPE_SUPER, OCFS2_SUPER_BLOCK_BLKNO, 433d680efe9SMark Fasheh 0, res->l_name); 434ccd979bdSMark Fasheh ocfs2_lock_res_init_common(osb, res, OCFS2_LOCK_TYPE_SUPER, 435ccd979bdSMark Fasheh &ocfs2_super_lops, osb); 436ccd979bdSMark Fasheh } 437ccd979bdSMark Fasheh 438ccd979bdSMark Fasheh static void ocfs2_rename_lock_res_init(struct ocfs2_lock_res *res, 439ccd979bdSMark Fasheh struct ocfs2_super *osb) 440ccd979bdSMark Fasheh { 441ccd979bdSMark Fasheh /* Rename lockres doesn't come from a slab so we call init 442ccd979bdSMark Fasheh * once on it manually. */ 443ccd979bdSMark Fasheh ocfs2_lock_res_init_once(res); 444d680efe9SMark Fasheh ocfs2_build_lock_name(OCFS2_LOCK_TYPE_RENAME, 0, 0, res->l_name); 445d680efe9SMark Fasheh ocfs2_lock_res_init_common(osb, res, OCFS2_LOCK_TYPE_RENAME, 446ccd979bdSMark Fasheh &ocfs2_rename_lops, osb); 447ccd979bdSMark Fasheh } 448ccd979bdSMark Fasheh 449ccd979bdSMark Fasheh void ocfs2_lock_res_free(struct ocfs2_lock_res *res) 450ccd979bdSMark Fasheh { 451ccd979bdSMark Fasheh mlog_entry_void(); 452ccd979bdSMark Fasheh 453ccd979bdSMark Fasheh if (!(res->l_flags & OCFS2_LOCK_INITIALIZED)) 454ccd979bdSMark Fasheh return; 455ccd979bdSMark Fasheh 456ccd979bdSMark Fasheh ocfs2_remove_lockres_tracking(res); 457ccd979bdSMark Fasheh 458ccd979bdSMark Fasheh mlog_bug_on_msg(!list_empty(&res->l_blocked_list), 459ccd979bdSMark Fasheh "Lockres %s is on the blocked list\n", 460ccd979bdSMark Fasheh res->l_name); 461ccd979bdSMark Fasheh mlog_bug_on_msg(!list_empty(&res->l_mask_waiters), 462ccd979bdSMark Fasheh "Lockres %s has mask waiters pending\n", 463ccd979bdSMark Fasheh res->l_name); 464ccd979bdSMark Fasheh mlog_bug_on_msg(spin_is_locked(&res->l_lock), 465ccd979bdSMark Fasheh "Lockres %s is locked\n", 466ccd979bdSMark Fasheh res->l_name); 467ccd979bdSMark Fasheh mlog_bug_on_msg(res->l_ro_holders, 468ccd979bdSMark Fasheh "Lockres %s has %u ro holders\n", 469ccd979bdSMark Fasheh res->l_name, res->l_ro_holders); 470ccd979bdSMark Fasheh mlog_bug_on_msg(res->l_ex_holders, 471ccd979bdSMark Fasheh "Lockres %s has %u ex holders\n", 472ccd979bdSMark Fasheh res->l_name, res->l_ex_holders); 473ccd979bdSMark Fasheh 474ccd979bdSMark Fasheh /* Need to clear out the lock status block for the dlm */ 475ccd979bdSMark Fasheh memset(&res->l_lksb, 0, sizeof(res->l_lksb)); 476ccd979bdSMark Fasheh 477ccd979bdSMark Fasheh res->l_flags = 0UL; 478ccd979bdSMark Fasheh mlog_exit_void(); 479ccd979bdSMark Fasheh } 480ccd979bdSMark Fasheh 481ccd979bdSMark Fasheh static inline void ocfs2_inc_holders(struct ocfs2_lock_res *lockres, 482ccd979bdSMark Fasheh int level) 483ccd979bdSMark Fasheh { 484ccd979bdSMark Fasheh mlog_entry_void(); 485ccd979bdSMark Fasheh 486ccd979bdSMark Fasheh BUG_ON(!lockres); 487ccd979bdSMark Fasheh 488ccd979bdSMark Fasheh switch(level) { 489ccd979bdSMark Fasheh case LKM_EXMODE: 490ccd979bdSMark Fasheh lockres->l_ex_holders++; 491ccd979bdSMark Fasheh break; 492ccd979bdSMark Fasheh case LKM_PRMODE: 493ccd979bdSMark Fasheh lockres->l_ro_holders++; 494ccd979bdSMark Fasheh break; 495ccd979bdSMark Fasheh default: 496ccd979bdSMark Fasheh BUG(); 497ccd979bdSMark Fasheh } 498ccd979bdSMark Fasheh 499ccd979bdSMark Fasheh mlog_exit_void(); 500ccd979bdSMark Fasheh } 501ccd979bdSMark Fasheh 502ccd979bdSMark Fasheh static inline void ocfs2_dec_holders(struct ocfs2_lock_res *lockres, 503ccd979bdSMark Fasheh int level) 504ccd979bdSMark Fasheh { 505ccd979bdSMark Fasheh mlog_entry_void(); 506ccd979bdSMark Fasheh 507ccd979bdSMark Fasheh BUG_ON(!lockres); 508ccd979bdSMark Fasheh 509ccd979bdSMark Fasheh switch(level) { 510ccd979bdSMark Fasheh case LKM_EXMODE: 511ccd979bdSMark Fasheh BUG_ON(!lockres->l_ex_holders); 512ccd979bdSMark Fasheh lockres->l_ex_holders--; 513ccd979bdSMark Fasheh break; 514ccd979bdSMark Fasheh case LKM_PRMODE: 515ccd979bdSMark Fasheh BUG_ON(!lockres->l_ro_holders); 516ccd979bdSMark Fasheh lockres->l_ro_holders--; 517ccd979bdSMark Fasheh break; 518ccd979bdSMark Fasheh default: 519ccd979bdSMark Fasheh BUG(); 520ccd979bdSMark Fasheh } 521ccd979bdSMark Fasheh mlog_exit_void(); 522ccd979bdSMark Fasheh } 523ccd979bdSMark Fasheh 524ccd979bdSMark Fasheh /* WARNING: This function lives in a world where the only three lock 525ccd979bdSMark Fasheh * levels are EX, PR, and NL. It *will* have to be adjusted when more 526ccd979bdSMark Fasheh * lock types are added. */ 527ccd979bdSMark Fasheh static inline int ocfs2_highest_compat_lock_level(int level) 528ccd979bdSMark Fasheh { 529ccd979bdSMark Fasheh int new_level = LKM_EXMODE; 530ccd979bdSMark Fasheh 531ccd979bdSMark Fasheh if (level == LKM_EXMODE) 532ccd979bdSMark Fasheh new_level = LKM_NLMODE; 533ccd979bdSMark Fasheh else if (level == LKM_PRMODE) 534ccd979bdSMark Fasheh new_level = LKM_PRMODE; 535ccd979bdSMark Fasheh return new_level; 536ccd979bdSMark Fasheh } 537ccd979bdSMark Fasheh 538ccd979bdSMark Fasheh static void lockres_set_flags(struct ocfs2_lock_res *lockres, 539ccd979bdSMark Fasheh unsigned long newflags) 540ccd979bdSMark Fasheh { 541ccd979bdSMark Fasheh struct list_head *pos, *tmp; 542ccd979bdSMark Fasheh struct ocfs2_mask_waiter *mw; 543ccd979bdSMark Fasheh 544ccd979bdSMark Fasheh assert_spin_locked(&lockres->l_lock); 545ccd979bdSMark Fasheh 546ccd979bdSMark Fasheh lockres->l_flags = newflags; 547ccd979bdSMark Fasheh 548ccd979bdSMark Fasheh list_for_each_safe(pos, tmp, &lockres->l_mask_waiters) { 549ccd979bdSMark Fasheh mw = list_entry(pos, struct ocfs2_mask_waiter, mw_item); 550ccd979bdSMark Fasheh if ((lockres->l_flags & mw->mw_mask) != mw->mw_goal) 551ccd979bdSMark Fasheh continue; 552ccd979bdSMark Fasheh 553ccd979bdSMark Fasheh list_del_init(&mw->mw_item); 554ccd979bdSMark Fasheh mw->mw_status = 0; 555ccd979bdSMark Fasheh complete(&mw->mw_complete); 556ccd979bdSMark Fasheh } 557ccd979bdSMark Fasheh } 558ccd979bdSMark Fasheh static void lockres_or_flags(struct ocfs2_lock_res *lockres, unsigned long or) 559ccd979bdSMark Fasheh { 560ccd979bdSMark Fasheh lockres_set_flags(lockres, lockres->l_flags | or); 561ccd979bdSMark Fasheh } 562ccd979bdSMark Fasheh static void lockres_clear_flags(struct ocfs2_lock_res *lockres, 563ccd979bdSMark Fasheh unsigned long clear) 564ccd979bdSMark Fasheh { 565ccd979bdSMark Fasheh lockres_set_flags(lockres, lockres->l_flags & ~clear); 566ccd979bdSMark Fasheh } 567ccd979bdSMark Fasheh 568ccd979bdSMark Fasheh static inline void ocfs2_generic_handle_downconvert_action(struct ocfs2_lock_res *lockres) 569ccd979bdSMark Fasheh { 570ccd979bdSMark Fasheh mlog_entry_void(); 571ccd979bdSMark Fasheh 572ccd979bdSMark Fasheh BUG_ON(!(lockres->l_flags & OCFS2_LOCK_BUSY)); 573ccd979bdSMark Fasheh BUG_ON(!(lockres->l_flags & OCFS2_LOCK_ATTACHED)); 574ccd979bdSMark Fasheh BUG_ON(!(lockres->l_flags & OCFS2_LOCK_BLOCKED)); 575ccd979bdSMark Fasheh BUG_ON(lockres->l_blocking <= LKM_NLMODE); 576ccd979bdSMark Fasheh 577ccd979bdSMark Fasheh lockres->l_level = lockres->l_requested; 578ccd979bdSMark Fasheh if (lockres->l_level <= 579ccd979bdSMark Fasheh ocfs2_highest_compat_lock_level(lockres->l_blocking)) { 580ccd979bdSMark Fasheh lockres->l_blocking = LKM_NLMODE; 581ccd979bdSMark Fasheh lockres_clear_flags(lockres, OCFS2_LOCK_BLOCKED); 582ccd979bdSMark Fasheh } 583ccd979bdSMark Fasheh lockres_clear_flags(lockres, OCFS2_LOCK_BUSY); 584ccd979bdSMark Fasheh 585ccd979bdSMark Fasheh mlog_exit_void(); 586ccd979bdSMark Fasheh } 587ccd979bdSMark Fasheh 588ccd979bdSMark Fasheh static inline void ocfs2_generic_handle_convert_action(struct ocfs2_lock_res *lockres) 589ccd979bdSMark Fasheh { 590ccd979bdSMark Fasheh mlog_entry_void(); 591ccd979bdSMark Fasheh 592ccd979bdSMark Fasheh BUG_ON(!(lockres->l_flags & OCFS2_LOCK_BUSY)); 593ccd979bdSMark Fasheh BUG_ON(!(lockres->l_flags & OCFS2_LOCK_ATTACHED)); 594ccd979bdSMark Fasheh 595ccd979bdSMark Fasheh /* Convert from RO to EX doesn't really need anything as our 596ccd979bdSMark Fasheh * information is already up to data. Convert from NL to 597ccd979bdSMark Fasheh * *anything* however should mark ourselves as needing an 598ccd979bdSMark Fasheh * update */ 599f625c979SMark Fasheh if (lockres->l_level == LKM_NLMODE && 600f625c979SMark Fasheh lockres->l_ops->flags & LOCK_TYPE_REQUIRES_REFRESH) 601ccd979bdSMark Fasheh lockres_or_flags(lockres, OCFS2_LOCK_NEEDS_REFRESH); 602ccd979bdSMark Fasheh 603ccd979bdSMark Fasheh lockres->l_level = lockres->l_requested; 604ccd979bdSMark Fasheh lockres_clear_flags(lockres, OCFS2_LOCK_BUSY); 605ccd979bdSMark Fasheh 606ccd979bdSMark Fasheh mlog_exit_void(); 607ccd979bdSMark Fasheh } 608ccd979bdSMark Fasheh 609ccd979bdSMark Fasheh static inline void ocfs2_generic_handle_attach_action(struct ocfs2_lock_res *lockres) 610ccd979bdSMark Fasheh { 611ccd979bdSMark Fasheh mlog_entry_void(); 612ccd979bdSMark Fasheh 613ccd979bdSMark Fasheh BUG_ON((!lockres->l_flags & OCFS2_LOCK_BUSY)); 614ccd979bdSMark Fasheh BUG_ON(lockres->l_flags & OCFS2_LOCK_ATTACHED); 615ccd979bdSMark Fasheh 616ccd979bdSMark Fasheh if (lockres->l_requested > LKM_NLMODE && 617f625c979SMark Fasheh !(lockres->l_flags & OCFS2_LOCK_LOCAL) && 618f625c979SMark Fasheh lockres->l_ops->flags & LOCK_TYPE_REQUIRES_REFRESH) 619ccd979bdSMark Fasheh lockres_or_flags(lockres, OCFS2_LOCK_NEEDS_REFRESH); 620ccd979bdSMark Fasheh 621ccd979bdSMark Fasheh lockres->l_level = lockres->l_requested; 622ccd979bdSMark Fasheh lockres_or_flags(lockres, OCFS2_LOCK_ATTACHED); 623ccd979bdSMark Fasheh lockres_clear_flags(lockres, OCFS2_LOCK_BUSY); 624ccd979bdSMark Fasheh 625ccd979bdSMark Fasheh mlog_exit_void(); 626ccd979bdSMark Fasheh } 627ccd979bdSMark Fasheh 628ccd979bdSMark Fasheh static void ocfs2_inode_ast_func(void *opaque) 629ccd979bdSMark Fasheh { 630ccd979bdSMark Fasheh struct ocfs2_lock_res *lockres = opaque; 631ccd979bdSMark Fasheh struct inode *inode; 632ccd979bdSMark Fasheh struct dlm_lockstatus *lksb; 633ccd979bdSMark Fasheh unsigned long flags; 634ccd979bdSMark Fasheh 635ccd979bdSMark Fasheh mlog_entry_void(); 636ccd979bdSMark Fasheh 637ccd979bdSMark Fasheh inode = ocfs2_lock_res_inode(lockres); 638ccd979bdSMark Fasheh 639b0697053SMark Fasheh mlog(0, "AST fired for inode %llu, l_action = %u, type = %s\n", 640b0697053SMark Fasheh (unsigned long long)OCFS2_I(inode)->ip_blkno, lockres->l_action, 641ccd979bdSMark Fasheh ocfs2_lock_type_string(lockres->l_type)); 642ccd979bdSMark Fasheh 643ccd979bdSMark Fasheh BUG_ON(!ocfs2_is_inode_lock(lockres)); 644ccd979bdSMark Fasheh 645ccd979bdSMark Fasheh spin_lock_irqsave(&lockres->l_lock, flags); 646ccd979bdSMark Fasheh 647ccd979bdSMark Fasheh lksb = &(lockres->l_lksb); 648ccd979bdSMark Fasheh if (lksb->status != DLM_NORMAL) { 649ccd979bdSMark Fasheh mlog(ML_ERROR, "ocfs2_inode_ast_func: lksb status value of %u " 650b0697053SMark Fasheh "on inode %llu\n", lksb->status, 651b0697053SMark Fasheh (unsigned long long)OCFS2_I(inode)->ip_blkno); 652ccd979bdSMark Fasheh spin_unlock_irqrestore(&lockres->l_lock, flags); 653ccd979bdSMark Fasheh mlog_exit_void(); 654ccd979bdSMark Fasheh return; 655ccd979bdSMark Fasheh } 656ccd979bdSMark Fasheh 657ccd979bdSMark Fasheh switch(lockres->l_action) { 658ccd979bdSMark Fasheh case OCFS2_AST_ATTACH: 659ccd979bdSMark Fasheh ocfs2_generic_handle_attach_action(lockres); 660ccd979bdSMark Fasheh lockres_clear_flags(lockres, OCFS2_LOCK_LOCAL); 661ccd979bdSMark Fasheh break; 662ccd979bdSMark Fasheh case OCFS2_AST_CONVERT: 663ccd979bdSMark Fasheh ocfs2_generic_handle_convert_action(lockres); 664ccd979bdSMark Fasheh break; 665ccd979bdSMark Fasheh case OCFS2_AST_DOWNCONVERT: 666ccd979bdSMark Fasheh ocfs2_generic_handle_downconvert_action(lockres); 667ccd979bdSMark Fasheh break; 668ccd979bdSMark Fasheh default: 669ccd979bdSMark Fasheh mlog(ML_ERROR, "lockres %s: ast fired with invalid action: %u " 670ccd979bdSMark Fasheh "lockres flags = 0x%lx, unlock action: %u\n", 671ccd979bdSMark Fasheh lockres->l_name, lockres->l_action, lockres->l_flags, 672ccd979bdSMark Fasheh lockres->l_unlock_action); 673ccd979bdSMark Fasheh 674ccd979bdSMark Fasheh BUG(); 675ccd979bdSMark Fasheh } 676ccd979bdSMark Fasheh 677ccd979bdSMark Fasheh /* set it to something invalid so if we get called again we 678ccd979bdSMark Fasheh * can catch it. */ 679ccd979bdSMark Fasheh lockres->l_action = OCFS2_AST_INVALID; 680ccd979bdSMark Fasheh spin_unlock_irqrestore(&lockres->l_lock, flags); 681ccd979bdSMark Fasheh wake_up(&lockres->l_event); 682ccd979bdSMark Fasheh 683ccd979bdSMark Fasheh mlog_exit_void(); 684ccd979bdSMark Fasheh } 685ccd979bdSMark Fasheh 686ccd979bdSMark Fasheh static int ocfs2_generic_handle_bast(struct ocfs2_lock_res *lockres, 687ccd979bdSMark Fasheh int level) 688ccd979bdSMark Fasheh { 689ccd979bdSMark Fasheh int needs_downconvert = 0; 690ccd979bdSMark Fasheh mlog_entry_void(); 691ccd979bdSMark Fasheh 692ccd979bdSMark Fasheh assert_spin_locked(&lockres->l_lock); 693ccd979bdSMark Fasheh 694ccd979bdSMark Fasheh lockres_or_flags(lockres, OCFS2_LOCK_BLOCKED); 695ccd979bdSMark Fasheh 696ccd979bdSMark Fasheh if (level > lockres->l_blocking) { 697ccd979bdSMark Fasheh /* only schedule a downconvert if we haven't already scheduled 698ccd979bdSMark Fasheh * one that goes low enough to satisfy the level we're 699ccd979bdSMark Fasheh * blocking. this also catches the case where we get 700ccd979bdSMark Fasheh * duplicate BASTs */ 701ccd979bdSMark Fasheh if (ocfs2_highest_compat_lock_level(level) < 702ccd979bdSMark Fasheh ocfs2_highest_compat_lock_level(lockres->l_blocking)) 703ccd979bdSMark Fasheh needs_downconvert = 1; 704ccd979bdSMark Fasheh 705ccd979bdSMark Fasheh lockres->l_blocking = level; 706ccd979bdSMark Fasheh } 707ccd979bdSMark Fasheh 708ccd979bdSMark Fasheh mlog_exit(needs_downconvert); 709ccd979bdSMark Fasheh return needs_downconvert; 710ccd979bdSMark Fasheh } 711ccd979bdSMark Fasheh 712ccd979bdSMark Fasheh static void ocfs2_generic_bast_func(struct ocfs2_super *osb, 713ccd979bdSMark Fasheh struct ocfs2_lock_res *lockres, 714ccd979bdSMark Fasheh int level) 715ccd979bdSMark Fasheh { 716ccd979bdSMark Fasheh int needs_downconvert; 717ccd979bdSMark Fasheh unsigned long flags; 718ccd979bdSMark Fasheh 719ccd979bdSMark Fasheh mlog_entry_void(); 720ccd979bdSMark Fasheh 721ccd979bdSMark Fasheh BUG_ON(level <= LKM_NLMODE); 722ccd979bdSMark Fasheh 723ccd979bdSMark Fasheh spin_lock_irqsave(&lockres->l_lock, flags); 724ccd979bdSMark Fasheh needs_downconvert = ocfs2_generic_handle_bast(lockres, level); 725ccd979bdSMark Fasheh if (needs_downconvert) 726ccd979bdSMark Fasheh ocfs2_schedule_blocked_lock(osb, lockres); 727ccd979bdSMark Fasheh spin_unlock_irqrestore(&lockres->l_lock, flags); 728ccd979bdSMark Fasheh 729d680efe9SMark Fasheh wake_up(&lockres->l_event); 730d680efe9SMark Fasheh 731ccd979bdSMark Fasheh ocfs2_kick_vote_thread(osb); 732ccd979bdSMark Fasheh 733ccd979bdSMark Fasheh mlog_exit_void(); 734ccd979bdSMark Fasheh } 735ccd979bdSMark Fasheh 736ccd979bdSMark Fasheh static void ocfs2_inode_bast_func(void *opaque, int level) 737ccd979bdSMark Fasheh { 738ccd979bdSMark Fasheh struct ocfs2_lock_res *lockres = opaque; 739ccd979bdSMark Fasheh struct inode *inode; 740ccd979bdSMark Fasheh struct ocfs2_super *osb; 741ccd979bdSMark Fasheh 742ccd979bdSMark Fasheh mlog_entry_void(); 743ccd979bdSMark Fasheh 744ccd979bdSMark Fasheh BUG_ON(!ocfs2_is_inode_lock(lockres)); 745ccd979bdSMark Fasheh 746ccd979bdSMark Fasheh inode = ocfs2_lock_res_inode(lockres); 747ccd979bdSMark Fasheh osb = OCFS2_SB(inode->i_sb); 748ccd979bdSMark Fasheh 749b0697053SMark Fasheh mlog(0, "BAST fired for inode %llu, blocking %d, level %d type %s\n", 750b0697053SMark Fasheh (unsigned long long)OCFS2_I(inode)->ip_blkno, level, 751b0697053SMark Fasheh lockres->l_level, ocfs2_lock_type_string(lockres->l_type)); 752ccd979bdSMark Fasheh 753ccd979bdSMark Fasheh ocfs2_generic_bast_func(osb, lockres, level); 754ccd979bdSMark Fasheh 755ccd979bdSMark Fasheh mlog_exit_void(); 756ccd979bdSMark Fasheh } 757ccd979bdSMark Fasheh 758f625c979SMark Fasheh static void ocfs2_generic_ast_func(struct ocfs2_lock_res *lockres) 759ccd979bdSMark Fasheh { 760ccd979bdSMark Fasheh struct dlm_lockstatus *lksb = &lockres->l_lksb; 761ccd979bdSMark Fasheh unsigned long flags; 762ccd979bdSMark Fasheh 763ccd979bdSMark Fasheh spin_lock_irqsave(&lockres->l_lock, flags); 764ccd979bdSMark Fasheh 765ccd979bdSMark Fasheh if (lksb->status != DLM_NORMAL) { 766ccd979bdSMark Fasheh mlog(ML_ERROR, "lockres %s: lksb status value of %u!\n", 767ccd979bdSMark Fasheh lockres->l_name, lksb->status); 768ccd979bdSMark Fasheh spin_unlock_irqrestore(&lockres->l_lock, flags); 769ccd979bdSMark Fasheh return; 770ccd979bdSMark Fasheh } 771ccd979bdSMark Fasheh 772ccd979bdSMark Fasheh switch(lockres->l_action) { 773ccd979bdSMark Fasheh case OCFS2_AST_ATTACH: 774ccd979bdSMark Fasheh ocfs2_generic_handle_attach_action(lockres); 775ccd979bdSMark Fasheh break; 776ccd979bdSMark Fasheh case OCFS2_AST_CONVERT: 777ccd979bdSMark Fasheh ocfs2_generic_handle_convert_action(lockres); 778ccd979bdSMark Fasheh break; 779ccd979bdSMark Fasheh case OCFS2_AST_DOWNCONVERT: 780ccd979bdSMark Fasheh ocfs2_generic_handle_downconvert_action(lockres); 781ccd979bdSMark Fasheh break; 782ccd979bdSMark Fasheh default: 783ccd979bdSMark Fasheh BUG(); 784ccd979bdSMark Fasheh } 785ccd979bdSMark Fasheh 786ccd979bdSMark Fasheh /* set it to something invalid so if we get called again we 787ccd979bdSMark Fasheh * can catch it. */ 788ccd979bdSMark Fasheh lockres->l_action = OCFS2_AST_INVALID; 789ccd979bdSMark Fasheh 790ccd979bdSMark Fasheh wake_up(&lockres->l_event); 791d680efe9SMark Fasheh spin_unlock_irqrestore(&lockres->l_lock, flags); 792ccd979bdSMark Fasheh } 793ccd979bdSMark Fasheh 794ccd979bdSMark Fasheh static void ocfs2_super_ast_func(void *opaque) 795ccd979bdSMark Fasheh { 796ccd979bdSMark Fasheh struct ocfs2_lock_res *lockres = opaque; 797ccd979bdSMark Fasheh 798ccd979bdSMark Fasheh mlog_entry_void(); 799ccd979bdSMark Fasheh mlog(0, "Superblock AST fired\n"); 800ccd979bdSMark Fasheh 801ccd979bdSMark Fasheh BUG_ON(!ocfs2_is_super_lock(lockres)); 802f625c979SMark Fasheh ocfs2_generic_ast_func(lockres); 803ccd979bdSMark Fasheh 804ccd979bdSMark Fasheh mlog_exit_void(); 805ccd979bdSMark Fasheh } 806ccd979bdSMark Fasheh 807ccd979bdSMark Fasheh static void ocfs2_super_bast_func(void *opaque, 808ccd979bdSMark Fasheh int level) 809ccd979bdSMark Fasheh { 810ccd979bdSMark Fasheh struct ocfs2_lock_res *lockres = opaque; 811ccd979bdSMark Fasheh struct ocfs2_super *osb; 812ccd979bdSMark Fasheh 813ccd979bdSMark Fasheh mlog_entry_void(); 814ccd979bdSMark Fasheh mlog(0, "Superblock BAST fired\n"); 815ccd979bdSMark Fasheh 816ccd979bdSMark Fasheh BUG_ON(!ocfs2_is_super_lock(lockres)); 817ccd979bdSMark Fasheh osb = ocfs2_lock_res_super(lockres); 818ccd979bdSMark Fasheh ocfs2_generic_bast_func(osb, lockres, level); 819ccd979bdSMark Fasheh 820ccd979bdSMark Fasheh mlog_exit_void(); 821ccd979bdSMark Fasheh } 822ccd979bdSMark Fasheh 823ccd979bdSMark Fasheh static void ocfs2_rename_ast_func(void *opaque) 824ccd979bdSMark Fasheh { 825ccd979bdSMark Fasheh struct ocfs2_lock_res *lockres = opaque; 826ccd979bdSMark Fasheh 827ccd979bdSMark Fasheh mlog_entry_void(); 828ccd979bdSMark Fasheh 829ccd979bdSMark Fasheh mlog(0, "Rename AST fired\n"); 830ccd979bdSMark Fasheh 831ccd979bdSMark Fasheh BUG_ON(!ocfs2_is_rename_lock(lockres)); 832ccd979bdSMark Fasheh 833f625c979SMark Fasheh ocfs2_generic_ast_func(lockres); 834ccd979bdSMark Fasheh 835ccd979bdSMark Fasheh mlog_exit_void(); 836ccd979bdSMark Fasheh } 837ccd979bdSMark Fasheh 838ccd979bdSMark Fasheh static void ocfs2_rename_bast_func(void *opaque, 839ccd979bdSMark Fasheh int level) 840ccd979bdSMark Fasheh { 841ccd979bdSMark Fasheh struct ocfs2_lock_res *lockres = opaque; 842ccd979bdSMark Fasheh struct ocfs2_super *osb; 843ccd979bdSMark Fasheh 844ccd979bdSMark Fasheh mlog_entry_void(); 845ccd979bdSMark Fasheh 846ccd979bdSMark Fasheh mlog(0, "Rename BAST fired\n"); 847ccd979bdSMark Fasheh 848ccd979bdSMark Fasheh BUG_ON(!ocfs2_is_rename_lock(lockres)); 849ccd979bdSMark Fasheh 850ccd979bdSMark Fasheh osb = ocfs2_lock_res_super(lockres); 851ccd979bdSMark Fasheh ocfs2_generic_bast_func(osb, lockres, level); 852ccd979bdSMark Fasheh 853ccd979bdSMark Fasheh mlog_exit_void(); 854ccd979bdSMark Fasheh } 855ccd979bdSMark Fasheh 856d680efe9SMark Fasheh static void ocfs2_dentry_ast_func(void *opaque) 857d680efe9SMark Fasheh { 858d680efe9SMark Fasheh struct ocfs2_lock_res *lockres = opaque; 859d680efe9SMark Fasheh 860d680efe9SMark Fasheh BUG_ON(!lockres); 861d680efe9SMark Fasheh 862f625c979SMark Fasheh ocfs2_generic_ast_func(lockres); 863d680efe9SMark Fasheh } 864d680efe9SMark Fasheh 865d680efe9SMark Fasheh static void ocfs2_dentry_bast_func(void *opaque, int level) 866d680efe9SMark Fasheh { 867d680efe9SMark Fasheh struct ocfs2_lock_res *lockres = opaque; 868d680efe9SMark Fasheh struct ocfs2_dentry_lock *dl = lockres->l_priv; 869d680efe9SMark Fasheh struct ocfs2_super *osb = OCFS2_SB(dl->dl_inode->i_sb); 870d680efe9SMark Fasheh 871d680efe9SMark Fasheh mlog(0, "Dentry bast: level: %d, name: %s\n", level, 872d680efe9SMark Fasheh lockres->l_name); 873d680efe9SMark Fasheh 874d680efe9SMark Fasheh ocfs2_generic_bast_func(osb, lockres, level); 875d680efe9SMark Fasheh } 876d680efe9SMark Fasheh 877ccd979bdSMark Fasheh static inline void ocfs2_recover_from_dlm_error(struct ocfs2_lock_res *lockres, 878ccd979bdSMark Fasheh int convert) 879ccd979bdSMark Fasheh { 880ccd979bdSMark Fasheh unsigned long flags; 881ccd979bdSMark Fasheh 882ccd979bdSMark Fasheh mlog_entry_void(); 883ccd979bdSMark Fasheh spin_lock_irqsave(&lockres->l_lock, flags); 884ccd979bdSMark Fasheh lockres_clear_flags(lockres, OCFS2_LOCK_BUSY); 885ccd979bdSMark Fasheh if (convert) 886ccd979bdSMark Fasheh lockres->l_action = OCFS2_AST_INVALID; 887ccd979bdSMark Fasheh else 888ccd979bdSMark Fasheh lockres->l_unlock_action = OCFS2_UNLOCK_INVALID; 889ccd979bdSMark Fasheh spin_unlock_irqrestore(&lockres->l_lock, flags); 890ccd979bdSMark Fasheh 891ccd979bdSMark Fasheh wake_up(&lockres->l_event); 892ccd979bdSMark Fasheh mlog_exit_void(); 893ccd979bdSMark Fasheh } 894ccd979bdSMark Fasheh 895ccd979bdSMark Fasheh /* Note: If we detect another process working on the lock (i.e., 896ccd979bdSMark Fasheh * OCFS2_LOCK_BUSY), we'll bail out returning 0. It's up to the caller 897ccd979bdSMark Fasheh * to do the right thing in that case. 898ccd979bdSMark Fasheh */ 899ccd979bdSMark Fasheh static int ocfs2_lock_create(struct ocfs2_super *osb, 900ccd979bdSMark Fasheh struct ocfs2_lock_res *lockres, 901ccd979bdSMark Fasheh int level, 902ccd979bdSMark Fasheh int dlm_flags) 903ccd979bdSMark Fasheh { 904ccd979bdSMark Fasheh int ret = 0; 905ccd979bdSMark Fasheh enum dlm_status status; 906ccd979bdSMark Fasheh unsigned long flags; 907ccd979bdSMark Fasheh 908ccd979bdSMark Fasheh mlog_entry_void(); 909ccd979bdSMark Fasheh 910ccd979bdSMark Fasheh mlog(0, "lock %s, level = %d, flags = %d\n", lockres->l_name, level, 911ccd979bdSMark Fasheh dlm_flags); 912ccd979bdSMark Fasheh 913ccd979bdSMark Fasheh spin_lock_irqsave(&lockres->l_lock, flags); 914ccd979bdSMark Fasheh if ((lockres->l_flags & OCFS2_LOCK_ATTACHED) || 915ccd979bdSMark Fasheh (lockres->l_flags & OCFS2_LOCK_BUSY)) { 916ccd979bdSMark Fasheh spin_unlock_irqrestore(&lockres->l_lock, flags); 917ccd979bdSMark Fasheh goto bail; 918ccd979bdSMark Fasheh } 919ccd979bdSMark Fasheh 920ccd979bdSMark Fasheh lockres->l_action = OCFS2_AST_ATTACH; 921ccd979bdSMark Fasheh lockres->l_requested = level; 922ccd979bdSMark Fasheh lockres_or_flags(lockres, OCFS2_LOCK_BUSY); 923ccd979bdSMark Fasheh spin_unlock_irqrestore(&lockres->l_lock, flags); 924ccd979bdSMark Fasheh 925ccd979bdSMark Fasheh status = dlmlock(osb->dlm, 926ccd979bdSMark Fasheh level, 927ccd979bdSMark Fasheh &lockres->l_lksb, 928ccd979bdSMark Fasheh dlm_flags, 929ccd979bdSMark Fasheh lockres->l_name, 930f0681062SMark Fasheh OCFS2_LOCK_ID_MAX_LEN - 1, 931ccd979bdSMark Fasheh lockres->l_ops->ast, 932ccd979bdSMark Fasheh lockres, 933ccd979bdSMark Fasheh lockres->l_ops->bast); 934ccd979bdSMark Fasheh if (status != DLM_NORMAL) { 935ccd979bdSMark Fasheh ocfs2_log_dlm_error("dlmlock", status, lockres); 936ccd979bdSMark Fasheh ret = -EINVAL; 937ccd979bdSMark Fasheh ocfs2_recover_from_dlm_error(lockres, 1); 938ccd979bdSMark Fasheh } 939ccd979bdSMark Fasheh 940ccd979bdSMark Fasheh mlog(0, "lock %s, successfull return from dlmlock\n", lockres->l_name); 941ccd979bdSMark Fasheh 942ccd979bdSMark Fasheh bail: 943ccd979bdSMark Fasheh mlog_exit(ret); 944ccd979bdSMark Fasheh return ret; 945ccd979bdSMark Fasheh } 946ccd979bdSMark Fasheh 947ccd979bdSMark Fasheh static inline int ocfs2_check_wait_flag(struct ocfs2_lock_res *lockres, 948ccd979bdSMark Fasheh int flag) 949ccd979bdSMark Fasheh { 950ccd979bdSMark Fasheh unsigned long flags; 951ccd979bdSMark Fasheh int ret; 952ccd979bdSMark Fasheh 953ccd979bdSMark Fasheh spin_lock_irqsave(&lockres->l_lock, flags); 954ccd979bdSMark Fasheh ret = lockres->l_flags & flag; 955ccd979bdSMark Fasheh spin_unlock_irqrestore(&lockres->l_lock, flags); 956ccd979bdSMark Fasheh 957ccd979bdSMark Fasheh return ret; 958ccd979bdSMark Fasheh } 959ccd979bdSMark Fasheh 960ccd979bdSMark Fasheh static inline void ocfs2_wait_on_busy_lock(struct ocfs2_lock_res *lockres) 961ccd979bdSMark Fasheh 962ccd979bdSMark Fasheh { 963ccd979bdSMark Fasheh wait_event(lockres->l_event, 964ccd979bdSMark Fasheh !ocfs2_check_wait_flag(lockres, OCFS2_LOCK_BUSY)); 965ccd979bdSMark Fasheh } 966ccd979bdSMark Fasheh 967ccd979bdSMark Fasheh static inline void ocfs2_wait_on_refreshing_lock(struct ocfs2_lock_res *lockres) 968ccd979bdSMark Fasheh 969ccd979bdSMark Fasheh { 970ccd979bdSMark Fasheh wait_event(lockres->l_event, 971ccd979bdSMark Fasheh !ocfs2_check_wait_flag(lockres, OCFS2_LOCK_REFRESHING)); 972ccd979bdSMark Fasheh } 973ccd979bdSMark Fasheh 974ccd979bdSMark Fasheh /* predict what lock level we'll be dropping down to on behalf 975ccd979bdSMark Fasheh * of another node, and return true if the currently wanted 976ccd979bdSMark Fasheh * level will be compatible with it. */ 977ccd979bdSMark Fasheh static inline int ocfs2_may_continue_on_blocked_lock(struct ocfs2_lock_res *lockres, 978ccd979bdSMark Fasheh int wanted) 979ccd979bdSMark Fasheh { 980ccd979bdSMark Fasheh BUG_ON(!(lockres->l_flags & OCFS2_LOCK_BLOCKED)); 981ccd979bdSMark Fasheh 982ccd979bdSMark Fasheh return wanted <= ocfs2_highest_compat_lock_level(lockres->l_blocking); 983ccd979bdSMark Fasheh } 984ccd979bdSMark Fasheh 985ccd979bdSMark Fasheh static void ocfs2_init_mask_waiter(struct ocfs2_mask_waiter *mw) 986ccd979bdSMark Fasheh { 987ccd979bdSMark Fasheh INIT_LIST_HEAD(&mw->mw_item); 988ccd979bdSMark Fasheh init_completion(&mw->mw_complete); 989ccd979bdSMark Fasheh } 990ccd979bdSMark Fasheh 991ccd979bdSMark Fasheh static int ocfs2_wait_for_mask(struct ocfs2_mask_waiter *mw) 992ccd979bdSMark Fasheh { 993ccd979bdSMark Fasheh wait_for_completion(&mw->mw_complete); 994ccd979bdSMark Fasheh /* Re-arm the completion in case we want to wait on it again */ 995ccd979bdSMark Fasheh INIT_COMPLETION(mw->mw_complete); 996ccd979bdSMark Fasheh return mw->mw_status; 997ccd979bdSMark Fasheh } 998ccd979bdSMark Fasheh 999ccd979bdSMark Fasheh static void lockres_add_mask_waiter(struct ocfs2_lock_res *lockres, 1000ccd979bdSMark Fasheh struct ocfs2_mask_waiter *mw, 1001ccd979bdSMark Fasheh unsigned long mask, 1002ccd979bdSMark Fasheh unsigned long goal) 1003ccd979bdSMark Fasheh { 1004ccd979bdSMark Fasheh BUG_ON(!list_empty(&mw->mw_item)); 1005ccd979bdSMark Fasheh 1006ccd979bdSMark Fasheh assert_spin_locked(&lockres->l_lock); 1007ccd979bdSMark Fasheh 1008ccd979bdSMark Fasheh list_add_tail(&mw->mw_item, &lockres->l_mask_waiters); 1009ccd979bdSMark Fasheh mw->mw_mask = mask; 1010ccd979bdSMark Fasheh mw->mw_goal = goal; 1011ccd979bdSMark Fasheh } 1012ccd979bdSMark Fasheh 1013ccd979bdSMark Fasheh /* returns 0 if the mw that was removed was already satisfied, -EBUSY 1014ccd979bdSMark Fasheh * if the mask still hadn't reached its goal */ 1015ccd979bdSMark Fasheh static int lockres_remove_mask_waiter(struct ocfs2_lock_res *lockres, 1016ccd979bdSMark Fasheh struct ocfs2_mask_waiter *mw) 1017ccd979bdSMark Fasheh { 1018ccd979bdSMark Fasheh unsigned long flags; 1019ccd979bdSMark Fasheh int ret = 0; 1020ccd979bdSMark Fasheh 1021ccd979bdSMark Fasheh spin_lock_irqsave(&lockres->l_lock, flags); 1022ccd979bdSMark Fasheh if (!list_empty(&mw->mw_item)) { 1023ccd979bdSMark Fasheh if ((lockres->l_flags & mw->mw_mask) != mw->mw_goal) 1024ccd979bdSMark Fasheh ret = -EBUSY; 1025ccd979bdSMark Fasheh 1026ccd979bdSMark Fasheh list_del_init(&mw->mw_item); 1027ccd979bdSMark Fasheh init_completion(&mw->mw_complete); 1028ccd979bdSMark Fasheh } 1029ccd979bdSMark Fasheh spin_unlock_irqrestore(&lockres->l_lock, flags); 1030ccd979bdSMark Fasheh 1031ccd979bdSMark Fasheh return ret; 1032ccd979bdSMark Fasheh 1033ccd979bdSMark Fasheh } 1034ccd979bdSMark Fasheh 1035ccd979bdSMark Fasheh static int ocfs2_cluster_lock(struct ocfs2_super *osb, 1036ccd979bdSMark Fasheh struct ocfs2_lock_res *lockres, 1037ccd979bdSMark Fasheh int level, 1038ccd979bdSMark Fasheh int lkm_flags, 1039ccd979bdSMark Fasheh int arg_flags) 1040ccd979bdSMark Fasheh { 1041ccd979bdSMark Fasheh struct ocfs2_mask_waiter mw; 1042ccd979bdSMark Fasheh enum dlm_status status; 1043ccd979bdSMark Fasheh int wait, catch_signals = !(osb->s_mount_opt & OCFS2_MOUNT_NOINTR); 1044ccd979bdSMark Fasheh int ret = 0; /* gcc doesn't realize wait = 1 guarantees ret is set */ 1045ccd979bdSMark Fasheh unsigned long flags; 1046ccd979bdSMark Fasheh 1047ccd979bdSMark Fasheh mlog_entry_void(); 1048ccd979bdSMark Fasheh 1049ccd979bdSMark Fasheh ocfs2_init_mask_waiter(&mw); 1050ccd979bdSMark Fasheh 1051ccd979bdSMark Fasheh again: 1052ccd979bdSMark Fasheh wait = 0; 1053ccd979bdSMark Fasheh 1054ccd979bdSMark Fasheh if (catch_signals && signal_pending(current)) { 1055ccd979bdSMark Fasheh ret = -ERESTARTSYS; 1056ccd979bdSMark Fasheh goto out; 1057ccd979bdSMark Fasheh } 1058ccd979bdSMark Fasheh 1059ccd979bdSMark Fasheh spin_lock_irqsave(&lockres->l_lock, flags); 1060ccd979bdSMark Fasheh 1061ccd979bdSMark Fasheh mlog_bug_on_msg(lockres->l_flags & OCFS2_LOCK_FREEING, 1062ccd979bdSMark Fasheh "Cluster lock called on freeing lockres %s! flags " 1063ccd979bdSMark Fasheh "0x%lx\n", lockres->l_name, lockres->l_flags); 1064ccd979bdSMark Fasheh 1065ccd979bdSMark Fasheh /* We only compare against the currently granted level 1066ccd979bdSMark Fasheh * here. If the lock is blocked waiting on a downconvert, 1067ccd979bdSMark Fasheh * we'll get caught below. */ 1068ccd979bdSMark Fasheh if (lockres->l_flags & OCFS2_LOCK_BUSY && 1069ccd979bdSMark Fasheh level > lockres->l_level) { 1070ccd979bdSMark Fasheh /* is someone sitting in dlm_lock? If so, wait on 1071ccd979bdSMark Fasheh * them. */ 1072ccd979bdSMark Fasheh lockres_add_mask_waiter(lockres, &mw, OCFS2_LOCK_BUSY, 0); 1073ccd979bdSMark Fasheh wait = 1; 1074ccd979bdSMark Fasheh goto unlock; 1075ccd979bdSMark Fasheh } 1076ccd979bdSMark Fasheh 1077ccd979bdSMark Fasheh if (!(lockres->l_flags & OCFS2_LOCK_ATTACHED)) { 1078ccd979bdSMark Fasheh /* lock has not been created yet. */ 1079ccd979bdSMark Fasheh spin_unlock_irqrestore(&lockres->l_lock, flags); 1080ccd979bdSMark Fasheh 1081ccd979bdSMark Fasheh ret = ocfs2_lock_create(osb, lockres, LKM_NLMODE, 0); 1082ccd979bdSMark Fasheh if (ret < 0) { 1083ccd979bdSMark Fasheh mlog_errno(ret); 1084ccd979bdSMark Fasheh goto out; 1085ccd979bdSMark Fasheh } 1086ccd979bdSMark Fasheh goto again; 1087ccd979bdSMark Fasheh } 1088ccd979bdSMark Fasheh 1089ccd979bdSMark Fasheh if (lockres->l_flags & OCFS2_LOCK_BLOCKED && 1090ccd979bdSMark Fasheh !ocfs2_may_continue_on_blocked_lock(lockres, level)) { 1091ccd979bdSMark Fasheh /* is the lock is currently blocked on behalf of 1092ccd979bdSMark Fasheh * another node */ 1093ccd979bdSMark Fasheh lockres_add_mask_waiter(lockres, &mw, OCFS2_LOCK_BLOCKED, 0); 1094ccd979bdSMark Fasheh wait = 1; 1095ccd979bdSMark Fasheh goto unlock; 1096ccd979bdSMark Fasheh } 1097ccd979bdSMark Fasheh 1098ccd979bdSMark Fasheh if (level > lockres->l_level) { 1099ccd979bdSMark Fasheh if (lockres->l_action != OCFS2_AST_INVALID) 1100ccd979bdSMark Fasheh mlog(ML_ERROR, "lockres %s has action %u pending\n", 1101ccd979bdSMark Fasheh lockres->l_name, lockres->l_action); 1102ccd979bdSMark Fasheh 1103ccd979bdSMark Fasheh lockres->l_action = OCFS2_AST_CONVERT; 1104ccd979bdSMark Fasheh lockres->l_requested = level; 1105ccd979bdSMark Fasheh lockres_or_flags(lockres, OCFS2_LOCK_BUSY); 1106ccd979bdSMark Fasheh spin_unlock_irqrestore(&lockres->l_lock, flags); 1107ccd979bdSMark Fasheh 1108ccd979bdSMark Fasheh BUG_ON(level == LKM_IVMODE); 1109ccd979bdSMark Fasheh BUG_ON(level == LKM_NLMODE); 1110ccd979bdSMark Fasheh 1111ccd979bdSMark Fasheh mlog(0, "lock %s, convert from %d to level = %d\n", 1112ccd979bdSMark Fasheh lockres->l_name, lockres->l_level, level); 1113ccd979bdSMark Fasheh 1114ccd979bdSMark Fasheh /* call dlm_lock to upgrade lock now */ 1115ccd979bdSMark Fasheh status = dlmlock(osb->dlm, 1116ccd979bdSMark Fasheh level, 1117ccd979bdSMark Fasheh &lockres->l_lksb, 1118ccd979bdSMark Fasheh lkm_flags|LKM_CONVERT|LKM_VALBLK, 1119ccd979bdSMark Fasheh lockres->l_name, 1120f0681062SMark Fasheh OCFS2_LOCK_ID_MAX_LEN - 1, 1121ccd979bdSMark Fasheh lockres->l_ops->ast, 1122ccd979bdSMark Fasheh lockres, 1123ccd979bdSMark Fasheh lockres->l_ops->bast); 1124ccd979bdSMark Fasheh if (status != DLM_NORMAL) { 1125ccd979bdSMark Fasheh if ((lkm_flags & LKM_NOQUEUE) && 1126ccd979bdSMark Fasheh (status == DLM_NOTQUEUED)) 1127ccd979bdSMark Fasheh ret = -EAGAIN; 1128ccd979bdSMark Fasheh else { 1129ccd979bdSMark Fasheh ocfs2_log_dlm_error("dlmlock", status, 1130ccd979bdSMark Fasheh lockres); 1131ccd979bdSMark Fasheh ret = -EINVAL; 1132ccd979bdSMark Fasheh } 1133ccd979bdSMark Fasheh ocfs2_recover_from_dlm_error(lockres, 1); 1134ccd979bdSMark Fasheh goto out; 1135ccd979bdSMark Fasheh } 1136ccd979bdSMark Fasheh 1137ccd979bdSMark Fasheh mlog(0, "lock %s, successfull return from dlmlock\n", 1138ccd979bdSMark Fasheh lockres->l_name); 1139ccd979bdSMark Fasheh 1140ccd979bdSMark Fasheh /* At this point we've gone inside the dlm and need to 1141ccd979bdSMark Fasheh * complete our work regardless. */ 1142ccd979bdSMark Fasheh catch_signals = 0; 1143ccd979bdSMark Fasheh 1144ccd979bdSMark Fasheh /* wait for busy to clear and carry on */ 1145ccd979bdSMark Fasheh goto again; 1146ccd979bdSMark Fasheh } 1147ccd979bdSMark Fasheh 1148ccd979bdSMark Fasheh /* Ok, if we get here then we're good to go. */ 1149ccd979bdSMark Fasheh ocfs2_inc_holders(lockres, level); 1150ccd979bdSMark Fasheh 1151ccd979bdSMark Fasheh ret = 0; 1152ccd979bdSMark Fasheh unlock: 1153ccd979bdSMark Fasheh spin_unlock_irqrestore(&lockres->l_lock, flags); 1154ccd979bdSMark Fasheh out: 1155ccd979bdSMark Fasheh /* 1156ccd979bdSMark Fasheh * This is helping work around a lock inversion between the page lock 1157ccd979bdSMark Fasheh * and dlm locks. One path holds the page lock while calling aops 1158ccd979bdSMark Fasheh * which block acquiring dlm locks. The voting thread holds dlm 1159ccd979bdSMark Fasheh * locks while acquiring page locks while down converting data locks. 1160ccd979bdSMark Fasheh * This block is helping an aop path notice the inversion and back 1161ccd979bdSMark Fasheh * off to unlock its page lock before trying the dlm lock again. 1162ccd979bdSMark Fasheh */ 1163ccd979bdSMark Fasheh if (wait && arg_flags & OCFS2_LOCK_NONBLOCK && 1164ccd979bdSMark Fasheh mw.mw_mask & (OCFS2_LOCK_BUSY|OCFS2_LOCK_BLOCKED)) { 1165ccd979bdSMark Fasheh wait = 0; 1166ccd979bdSMark Fasheh if (lockres_remove_mask_waiter(lockres, &mw)) 1167ccd979bdSMark Fasheh ret = -EAGAIN; 1168ccd979bdSMark Fasheh else 1169ccd979bdSMark Fasheh goto again; 1170ccd979bdSMark Fasheh } 1171ccd979bdSMark Fasheh if (wait) { 1172ccd979bdSMark Fasheh ret = ocfs2_wait_for_mask(&mw); 1173ccd979bdSMark Fasheh if (ret == 0) 1174ccd979bdSMark Fasheh goto again; 1175ccd979bdSMark Fasheh mlog_errno(ret); 1176ccd979bdSMark Fasheh } 1177ccd979bdSMark Fasheh 1178ccd979bdSMark Fasheh mlog_exit(ret); 1179ccd979bdSMark Fasheh return ret; 1180ccd979bdSMark Fasheh } 1181ccd979bdSMark Fasheh 1182ccd979bdSMark Fasheh static void ocfs2_cluster_unlock(struct ocfs2_super *osb, 1183ccd979bdSMark Fasheh struct ocfs2_lock_res *lockres, 1184ccd979bdSMark Fasheh int level) 1185ccd979bdSMark Fasheh { 1186ccd979bdSMark Fasheh unsigned long flags; 1187ccd979bdSMark Fasheh 1188ccd979bdSMark Fasheh mlog_entry_void(); 1189ccd979bdSMark Fasheh spin_lock_irqsave(&lockres->l_lock, flags); 1190ccd979bdSMark Fasheh ocfs2_dec_holders(lockres, level); 1191ccd979bdSMark Fasheh ocfs2_vote_on_unlock(osb, lockres); 1192ccd979bdSMark Fasheh spin_unlock_irqrestore(&lockres->l_lock, flags); 1193ccd979bdSMark Fasheh mlog_exit_void(); 1194ccd979bdSMark Fasheh } 1195ccd979bdSMark Fasheh 1196d680efe9SMark Fasheh int ocfs2_create_new_lock(struct ocfs2_super *osb, 1197d680efe9SMark Fasheh struct ocfs2_lock_res *lockres, 119824c19ef4SMark Fasheh int ex, 119924c19ef4SMark Fasheh int local) 1200ccd979bdSMark Fasheh { 1201d680efe9SMark Fasheh int level = ex ? LKM_EXMODE : LKM_PRMODE; 1202ccd979bdSMark Fasheh unsigned long flags; 120324c19ef4SMark Fasheh int lkm_flags = local ? LKM_LOCAL : 0; 1204ccd979bdSMark Fasheh 1205ccd979bdSMark Fasheh spin_lock_irqsave(&lockres->l_lock, flags); 1206ccd979bdSMark Fasheh BUG_ON(lockres->l_flags & OCFS2_LOCK_ATTACHED); 1207ccd979bdSMark Fasheh lockres_or_flags(lockres, OCFS2_LOCK_LOCAL); 1208ccd979bdSMark Fasheh spin_unlock_irqrestore(&lockres->l_lock, flags); 1209ccd979bdSMark Fasheh 121024c19ef4SMark Fasheh return ocfs2_lock_create(osb, lockres, level, lkm_flags); 1211ccd979bdSMark Fasheh } 1212ccd979bdSMark Fasheh 1213ccd979bdSMark Fasheh /* Grants us an EX lock on the data and metadata resources, skipping 1214ccd979bdSMark Fasheh * the normal cluster directory lookup. Use this ONLY on newly created 1215ccd979bdSMark Fasheh * inodes which other nodes can't possibly see, and which haven't been 1216ccd979bdSMark Fasheh * hashed in the inode hash yet. This can give us a good performance 1217ccd979bdSMark Fasheh * increase as it'll skip the network broadcast normally associated 1218ccd979bdSMark Fasheh * with creating a new lock resource. */ 1219ccd979bdSMark Fasheh int ocfs2_create_new_inode_locks(struct inode *inode) 1220ccd979bdSMark Fasheh { 1221ccd979bdSMark Fasheh int ret; 1222d680efe9SMark Fasheh struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); 1223ccd979bdSMark Fasheh 1224ccd979bdSMark Fasheh BUG_ON(!inode); 1225ccd979bdSMark Fasheh BUG_ON(!ocfs2_inode_is_new(inode)); 1226ccd979bdSMark Fasheh 1227ccd979bdSMark Fasheh mlog_entry_void(); 1228ccd979bdSMark Fasheh 1229b0697053SMark Fasheh mlog(0, "Inode %llu\n", (unsigned long long)OCFS2_I(inode)->ip_blkno); 1230ccd979bdSMark Fasheh 1231ccd979bdSMark Fasheh /* NOTE: That we don't increment any of the holder counts, nor 1232ccd979bdSMark Fasheh * do we add anything to a journal handle. Since this is 1233ccd979bdSMark Fasheh * supposed to be a new inode which the cluster doesn't know 1234ccd979bdSMark Fasheh * about yet, there is no need to. As far as the LVB handling 1235ccd979bdSMark Fasheh * is concerned, this is basically like acquiring an EX lock 1236ccd979bdSMark Fasheh * on a resource which has an invalid one -- we'll set it 1237ccd979bdSMark Fasheh * valid when we release the EX. */ 1238ccd979bdSMark Fasheh 123924c19ef4SMark Fasheh ret = ocfs2_create_new_lock(osb, &OCFS2_I(inode)->ip_rw_lockres, 1, 1); 1240ccd979bdSMark Fasheh if (ret) { 1241ccd979bdSMark Fasheh mlog_errno(ret); 1242ccd979bdSMark Fasheh goto bail; 1243ccd979bdSMark Fasheh } 1244ccd979bdSMark Fasheh 124524c19ef4SMark Fasheh /* 124624c19ef4SMark Fasheh * We don't want to use LKM_LOCAL on a meta data lock as they 124724c19ef4SMark Fasheh * don't use a generation in their lock names. 124824c19ef4SMark Fasheh */ 124924c19ef4SMark Fasheh ret = ocfs2_create_new_lock(osb, &OCFS2_I(inode)->ip_meta_lockres, 1, 0); 1250ccd979bdSMark Fasheh if (ret) { 1251ccd979bdSMark Fasheh mlog_errno(ret); 1252ccd979bdSMark Fasheh goto bail; 1253ccd979bdSMark Fasheh } 1254ccd979bdSMark Fasheh 125524c19ef4SMark Fasheh ret = ocfs2_create_new_lock(osb, &OCFS2_I(inode)->ip_data_lockres, 1, 1); 1256ccd979bdSMark Fasheh if (ret) { 1257ccd979bdSMark Fasheh mlog_errno(ret); 1258ccd979bdSMark Fasheh goto bail; 1259ccd979bdSMark Fasheh } 1260ccd979bdSMark Fasheh 1261ccd979bdSMark Fasheh bail: 1262ccd979bdSMark Fasheh mlog_exit(ret); 1263ccd979bdSMark Fasheh return ret; 1264ccd979bdSMark Fasheh } 1265ccd979bdSMark Fasheh 1266ccd979bdSMark Fasheh int ocfs2_rw_lock(struct inode *inode, int write) 1267ccd979bdSMark Fasheh { 1268ccd979bdSMark Fasheh int status, level; 1269ccd979bdSMark Fasheh struct ocfs2_lock_res *lockres; 1270ccd979bdSMark Fasheh 1271ccd979bdSMark Fasheh BUG_ON(!inode); 1272ccd979bdSMark Fasheh 1273ccd979bdSMark Fasheh mlog_entry_void(); 1274ccd979bdSMark Fasheh 1275b0697053SMark Fasheh mlog(0, "inode %llu take %s RW lock\n", 1276b0697053SMark Fasheh (unsigned long long)OCFS2_I(inode)->ip_blkno, 1277ccd979bdSMark Fasheh write ? "EXMODE" : "PRMODE"); 1278ccd979bdSMark Fasheh 1279ccd979bdSMark Fasheh lockres = &OCFS2_I(inode)->ip_rw_lockres; 1280ccd979bdSMark Fasheh 1281ccd979bdSMark Fasheh level = write ? LKM_EXMODE : LKM_PRMODE; 1282ccd979bdSMark Fasheh 1283ccd979bdSMark Fasheh status = ocfs2_cluster_lock(OCFS2_SB(inode->i_sb), lockres, level, 0, 1284ccd979bdSMark Fasheh 0); 1285ccd979bdSMark Fasheh if (status < 0) 1286ccd979bdSMark Fasheh mlog_errno(status); 1287ccd979bdSMark Fasheh 1288ccd979bdSMark Fasheh mlog_exit(status); 1289ccd979bdSMark Fasheh return status; 1290ccd979bdSMark Fasheh } 1291ccd979bdSMark Fasheh 1292ccd979bdSMark Fasheh void ocfs2_rw_unlock(struct inode *inode, int write) 1293ccd979bdSMark Fasheh { 1294ccd979bdSMark Fasheh int level = write ? LKM_EXMODE : LKM_PRMODE; 1295ccd979bdSMark Fasheh struct ocfs2_lock_res *lockres = &OCFS2_I(inode)->ip_rw_lockres; 1296ccd979bdSMark Fasheh 1297ccd979bdSMark Fasheh mlog_entry_void(); 1298ccd979bdSMark Fasheh 1299b0697053SMark Fasheh mlog(0, "inode %llu drop %s RW lock\n", 1300b0697053SMark Fasheh (unsigned long long)OCFS2_I(inode)->ip_blkno, 1301ccd979bdSMark Fasheh write ? "EXMODE" : "PRMODE"); 1302ccd979bdSMark Fasheh 1303ccd979bdSMark Fasheh ocfs2_cluster_unlock(OCFS2_SB(inode->i_sb), lockres, level); 1304ccd979bdSMark Fasheh 1305ccd979bdSMark Fasheh mlog_exit_void(); 1306ccd979bdSMark Fasheh } 1307ccd979bdSMark Fasheh 1308ccd979bdSMark Fasheh int ocfs2_data_lock_full(struct inode *inode, 1309ccd979bdSMark Fasheh int write, 1310ccd979bdSMark Fasheh int arg_flags) 1311ccd979bdSMark Fasheh { 1312ccd979bdSMark Fasheh int status = 0, level; 1313ccd979bdSMark Fasheh struct ocfs2_lock_res *lockres; 1314ccd979bdSMark Fasheh 1315ccd979bdSMark Fasheh BUG_ON(!inode); 1316ccd979bdSMark Fasheh 1317ccd979bdSMark Fasheh mlog_entry_void(); 1318ccd979bdSMark Fasheh 1319b0697053SMark Fasheh mlog(0, "inode %llu take %s DATA lock\n", 1320b0697053SMark Fasheh (unsigned long long)OCFS2_I(inode)->ip_blkno, 1321ccd979bdSMark Fasheh write ? "EXMODE" : "PRMODE"); 1322ccd979bdSMark Fasheh 1323ccd979bdSMark Fasheh /* We'll allow faking a readonly data lock for 1324ccd979bdSMark Fasheh * rodevices. */ 1325ccd979bdSMark Fasheh if (ocfs2_is_hard_readonly(OCFS2_SB(inode->i_sb))) { 1326ccd979bdSMark Fasheh if (write) { 1327ccd979bdSMark Fasheh status = -EROFS; 1328ccd979bdSMark Fasheh mlog_errno(status); 1329ccd979bdSMark Fasheh } 1330ccd979bdSMark Fasheh goto out; 1331ccd979bdSMark Fasheh } 1332ccd979bdSMark Fasheh 1333ccd979bdSMark Fasheh lockres = &OCFS2_I(inode)->ip_data_lockres; 1334ccd979bdSMark Fasheh 1335ccd979bdSMark Fasheh level = write ? LKM_EXMODE : LKM_PRMODE; 1336ccd979bdSMark Fasheh 1337ccd979bdSMark Fasheh status = ocfs2_cluster_lock(OCFS2_SB(inode->i_sb), lockres, level, 1338ccd979bdSMark Fasheh 0, arg_flags); 1339ccd979bdSMark Fasheh if (status < 0 && status != -EAGAIN) 1340ccd979bdSMark Fasheh mlog_errno(status); 1341ccd979bdSMark Fasheh 1342ccd979bdSMark Fasheh out: 1343ccd979bdSMark Fasheh mlog_exit(status); 1344ccd979bdSMark Fasheh return status; 1345ccd979bdSMark Fasheh } 1346ccd979bdSMark Fasheh 1347ccd979bdSMark Fasheh /* see ocfs2_meta_lock_with_page() */ 1348ccd979bdSMark Fasheh int ocfs2_data_lock_with_page(struct inode *inode, 1349ccd979bdSMark Fasheh int write, 1350ccd979bdSMark Fasheh struct page *page) 1351ccd979bdSMark Fasheh { 1352ccd979bdSMark Fasheh int ret; 1353ccd979bdSMark Fasheh 1354ccd979bdSMark Fasheh ret = ocfs2_data_lock_full(inode, write, OCFS2_LOCK_NONBLOCK); 1355ccd979bdSMark Fasheh if (ret == -EAGAIN) { 1356ccd979bdSMark Fasheh unlock_page(page); 1357ccd979bdSMark Fasheh if (ocfs2_data_lock(inode, write) == 0) 1358ccd979bdSMark Fasheh ocfs2_data_unlock(inode, write); 1359ccd979bdSMark Fasheh ret = AOP_TRUNCATED_PAGE; 1360ccd979bdSMark Fasheh } 1361ccd979bdSMark Fasheh 1362ccd979bdSMark Fasheh return ret; 1363ccd979bdSMark Fasheh } 1364ccd979bdSMark Fasheh 1365ccd979bdSMark Fasheh static void ocfs2_vote_on_unlock(struct ocfs2_super *osb, 1366ccd979bdSMark Fasheh struct ocfs2_lock_res *lockres) 1367ccd979bdSMark Fasheh { 1368ccd979bdSMark Fasheh int kick = 0; 1369ccd979bdSMark Fasheh 1370ccd979bdSMark Fasheh mlog_entry_void(); 1371ccd979bdSMark Fasheh 1372ccd979bdSMark Fasheh /* If we know that another node is waiting on our lock, kick 1373ccd979bdSMark Fasheh * the vote thread * pre-emptively when we reach a release 1374ccd979bdSMark Fasheh * condition. */ 1375ccd979bdSMark Fasheh if (lockres->l_flags & OCFS2_LOCK_BLOCKED) { 1376ccd979bdSMark Fasheh switch(lockres->l_blocking) { 1377ccd979bdSMark Fasheh case LKM_EXMODE: 1378ccd979bdSMark Fasheh if (!lockres->l_ex_holders && !lockres->l_ro_holders) 1379ccd979bdSMark Fasheh kick = 1; 1380ccd979bdSMark Fasheh break; 1381ccd979bdSMark Fasheh case LKM_PRMODE: 1382ccd979bdSMark Fasheh if (!lockres->l_ex_holders) 1383ccd979bdSMark Fasheh kick = 1; 1384ccd979bdSMark Fasheh break; 1385ccd979bdSMark Fasheh default: 1386ccd979bdSMark Fasheh BUG(); 1387ccd979bdSMark Fasheh } 1388ccd979bdSMark Fasheh } 1389ccd979bdSMark Fasheh 1390ccd979bdSMark Fasheh if (kick) 1391ccd979bdSMark Fasheh ocfs2_kick_vote_thread(osb); 1392ccd979bdSMark Fasheh 1393ccd979bdSMark Fasheh mlog_exit_void(); 1394ccd979bdSMark Fasheh } 1395ccd979bdSMark Fasheh 1396ccd979bdSMark Fasheh void ocfs2_data_unlock(struct inode *inode, 1397ccd979bdSMark Fasheh int write) 1398ccd979bdSMark Fasheh { 1399ccd979bdSMark Fasheh int level = write ? LKM_EXMODE : LKM_PRMODE; 1400ccd979bdSMark Fasheh struct ocfs2_lock_res *lockres = &OCFS2_I(inode)->ip_data_lockres; 1401ccd979bdSMark Fasheh 1402ccd979bdSMark Fasheh mlog_entry_void(); 1403ccd979bdSMark Fasheh 1404b0697053SMark Fasheh mlog(0, "inode %llu drop %s DATA lock\n", 1405b0697053SMark Fasheh (unsigned long long)OCFS2_I(inode)->ip_blkno, 1406ccd979bdSMark Fasheh write ? "EXMODE" : "PRMODE"); 1407ccd979bdSMark Fasheh 1408ccd979bdSMark Fasheh if (!ocfs2_is_hard_readonly(OCFS2_SB(inode->i_sb))) 1409ccd979bdSMark Fasheh ocfs2_cluster_unlock(OCFS2_SB(inode->i_sb), lockres, level); 1410ccd979bdSMark Fasheh 1411ccd979bdSMark Fasheh mlog_exit_void(); 1412ccd979bdSMark Fasheh } 1413ccd979bdSMark Fasheh 1414ccd979bdSMark Fasheh #define OCFS2_SEC_BITS 34 1415ccd979bdSMark Fasheh #define OCFS2_SEC_SHIFT (64 - 34) 1416ccd979bdSMark Fasheh #define OCFS2_NSEC_MASK ((1ULL << OCFS2_SEC_SHIFT) - 1) 1417ccd979bdSMark Fasheh 1418ccd979bdSMark Fasheh /* LVB only has room for 64 bits of time here so we pack it for 1419ccd979bdSMark Fasheh * now. */ 1420ccd979bdSMark Fasheh static u64 ocfs2_pack_timespec(struct timespec *spec) 1421ccd979bdSMark Fasheh { 1422ccd979bdSMark Fasheh u64 res; 1423ccd979bdSMark Fasheh u64 sec = spec->tv_sec; 1424ccd979bdSMark Fasheh u32 nsec = spec->tv_nsec; 1425ccd979bdSMark Fasheh 1426ccd979bdSMark Fasheh res = (sec << OCFS2_SEC_SHIFT) | (nsec & OCFS2_NSEC_MASK); 1427ccd979bdSMark Fasheh 1428ccd979bdSMark Fasheh return res; 1429ccd979bdSMark Fasheh } 1430ccd979bdSMark Fasheh 1431ccd979bdSMark Fasheh /* Call this with the lockres locked. I am reasonably sure we don't 1432ccd979bdSMark Fasheh * need ip_lock in this function as anyone who would be changing those 1433ccd979bdSMark Fasheh * values is supposed to be blocked in ocfs2_meta_lock right now. */ 1434ccd979bdSMark Fasheh static void __ocfs2_stuff_meta_lvb(struct inode *inode) 1435ccd979bdSMark Fasheh { 1436ccd979bdSMark Fasheh struct ocfs2_inode_info *oi = OCFS2_I(inode); 1437ccd979bdSMark Fasheh struct ocfs2_lock_res *lockres = &oi->ip_meta_lockres; 1438ccd979bdSMark Fasheh struct ocfs2_meta_lvb *lvb; 1439ccd979bdSMark Fasheh 1440ccd979bdSMark Fasheh mlog_entry_void(); 1441ccd979bdSMark Fasheh 1442ccd979bdSMark Fasheh lvb = (struct ocfs2_meta_lvb *) lockres->l_lksb.lvb; 1443ccd979bdSMark Fasheh 144424c19ef4SMark Fasheh /* 144524c19ef4SMark Fasheh * Invalidate the LVB of a deleted inode - this way other 144624c19ef4SMark Fasheh * nodes are forced to go to disk and discover the new inode 144724c19ef4SMark Fasheh * status. 144824c19ef4SMark Fasheh */ 144924c19ef4SMark Fasheh if (oi->ip_flags & OCFS2_INODE_DELETED) { 145024c19ef4SMark Fasheh lvb->lvb_version = 0; 145124c19ef4SMark Fasheh goto out; 145224c19ef4SMark Fasheh } 145324c19ef4SMark Fasheh 14544d3b83f7SMark Fasheh lvb->lvb_version = OCFS2_LVB_VERSION; 1455ccd979bdSMark Fasheh lvb->lvb_isize = cpu_to_be64(i_size_read(inode)); 1456ccd979bdSMark Fasheh lvb->lvb_iclusters = cpu_to_be32(oi->ip_clusters); 1457ccd979bdSMark Fasheh lvb->lvb_iuid = cpu_to_be32(inode->i_uid); 1458ccd979bdSMark Fasheh lvb->lvb_igid = cpu_to_be32(inode->i_gid); 1459ccd979bdSMark Fasheh lvb->lvb_imode = cpu_to_be16(inode->i_mode); 1460ccd979bdSMark Fasheh lvb->lvb_inlink = cpu_to_be16(inode->i_nlink); 1461ccd979bdSMark Fasheh lvb->lvb_iatime_packed = 1462ccd979bdSMark Fasheh cpu_to_be64(ocfs2_pack_timespec(&inode->i_atime)); 1463ccd979bdSMark Fasheh lvb->lvb_ictime_packed = 1464ccd979bdSMark Fasheh cpu_to_be64(ocfs2_pack_timespec(&inode->i_ctime)); 1465ccd979bdSMark Fasheh lvb->lvb_imtime_packed = 1466ccd979bdSMark Fasheh cpu_to_be64(ocfs2_pack_timespec(&inode->i_mtime)); 1467ca4d147eSHerbert Poetzl lvb->lvb_iattr = cpu_to_be32(oi->ip_attr); 1468f9e2d82eSMark Fasheh lvb->lvb_igeneration = cpu_to_be32(inode->i_generation); 1469ccd979bdSMark Fasheh 147024c19ef4SMark Fasheh out: 1471ccd979bdSMark Fasheh mlog_meta_lvb(0, lockres); 1472ccd979bdSMark Fasheh 1473ccd979bdSMark Fasheh mlog_exit_void(); 1474ccd979bdSMark Fasheh } 1475ccd979bdSMark Fasheh 1476ccd979bdSMark Fasheh static void ocfs2_unpack_timespec(struct timespec *spec, 1477ccd979bdSMark Fasheh u64 packed_time) 1478ccd979bdSMark Fasheh { 1479ccd979bdSMark Fasheh spec->tv_sec = packed_time >> OCFS2_SEC_SHIFT; 1480ccd979bdSMark Fasheh spec->tv_nsec = packed_time & OCFS2_NSEC_MASK; 1481ccd979bdSMark Fasheh } 1482ccd979bdSMark Fasheh 1483ccd979bdSMark Fasheh static void ocfs2_refresh_inode_from_lvb(struct inode *inode) 1484ccd979bdSMark Fasheh { 1485ccd979bdSMark Fasheh struct ocfs2_inode_info *oi = OCFS2_I(inode); 1486ccd979bdSMark Fasheh struct ocfs2_lock_res *lockres = &oi->ip_meta_lockres; 1487ccd979bdSMark Fasheh struct ocfs2_meta_lvb *lvb; 1488ccd979bdSMark Fasheh 1489ccd979bdSMark Fasheh mlog_entry_void(); 1490ccd979bdSMark Fasheh 1491ccd979bdSMark Fasheh mlog_meta_lvb(0, lockres); 1492ccd979bdSMark Fasheh 1493ccd979bdSMark Fasheh lvb = (struct ocfs2_meta_lvb *) lockres->l_lksb.lvb; 1494ccd979bdSMark Fasheh 1495ccd979bdSMark Fasheh /* We're safe here without the lockres lock... */ 1496ccd979bdSMark Fasheh spin_lock(&oi->ip_lock); 1497ccd979bdSMark Fasheh oi->ip_clusters = be32_to_cpu(lvb->lvb_iclusters); 1498ccd979bdSMark Fasheh i_size_write(inode, be64_to_cpu(lvb->lvb_isize)); 1499ccd979bdSMark Fasheh 1500ca4d147eSHerbert Poetzl oi->ip_attr = be32_to_cpu(lvb->lvb_iattr); 1501ca4d147eSHerbert Poetzl ocfs2_set_inode_flags(inode); 1502ca4d147eSHerbert Poetzl 1503ccd979bdSMark Fasheh /* fast-symlinks are a special case */ 1504ccd979bdSMark Fasheh if (S_ISLNK(inode->i_mode) && !oi->ip_clusters) 1505ccd979bdSMark Fasheh inode->i_blocks = 0; 1506ccd979bdSMark Fasheh else 1507ccd979bdSMark Fasheh inode->i_blocks = 1508ccd979bdSMark Fasheh ocfs2_align_bytes_to_sectors(i_size_read(inode)); 1509ccd979bdSMark Fasheh 1510ccd979bdSMark Fasheh inode->i_uid = be32_to_cpu(lvb->lvb_iuid); 1511ccd979bdSMark Fasheh inode->i_gid = be32_to_cpu(lvb->lvb_igid); 1512ccd979bdSMark Fasheh inode->i_mode = be16_to_cpu(lvb->lvb_imode); 1513ccd979bdSMark Fasheh inode->i_nlink = be16_to_cpu(lvb->lvb_inlink); 1514ccd979bdSMark Fasheh ocfs2_unpack_timespec(&inode->i_atime, 1515ccd979bdSMark Fasheh be64_to_cpu(lvb->lvb_iatime_packed)); 1516ccd979bdSMark Fasheh ocfs2_unpack_timespec(&inode->i_mtime, 1517ccd979bdSMark Fasheh be64_to_cpu(lvb->lvb_imtime_packed)); 1518ccd979bdSMark Fasheh ocfs2_unpack_timespec(&inode->i_ctime, 1519ccd979bdSMark Fasheh be64_to_cpu(lvb->lvb_ictime_packed)); 1520ccd979bdSMark Fasheh spin_unlock(&oi->ip_lock); 1521ccd979bdSMark Fasheh 1522ccd979bdSMark Fasheh mlog_exit_void(); 1523ccd979bdSMark Fasheh } 1524ccd979bdSMark Fasheh 1525f9e2d82eSMark Fasheh static inline int ocfs2_meta_lvb_is_trustable(struct inode *inode, 1526f9e2d82eSMark Fasheh struct ocfs2_lock_res *lockres) 1527ccd979bdSMark Fasheh { 1528ccd979bdSMark Fasheh struct ocfs2_meta_lvb *lvb = (struct ocfs2_meta_lvb *) lockres->l_lksb.lvb; 1529ccd979bdSMark Fasheh 1530f9e2d82eSMark Fasheh if (lvb->lvb_version == OCFS2_LVB_VERSION 1531f9e2d82eSMark Fasheh && be32_to_cpu(lvb->lvb_igeneration) == inode->i_generation) 1532ccd979bdSMark Fasheh return 1; 1533ccd979bdSMark Fasheh return 0; 1534ccd979bdSMark Fasheh } 1535ccd979bdSMark Fasheh 1536ccd979bdSMark Fasheh /* Determine whether a lock resource needs to be refreshed, and 1537ccd979bdSMark Fasheh * arbitrate who gets to refresh it. 1538ccd979bdSMark Fasheh * 1539ccd979bdSMark Fasheh * 0 means no refresh needed. 1540ccd979bdSMark Fasheh * 1541ccd979bdSMark Fasheh * > 0 means you need to refresh this and you MUST call 1542ccd979bdSMark Fasheh * ocfs2_complete_lock_res_refresh afterwards. */ 1543ccd979bdSMark Fasheh static int ocfs2_should_refresh_lock_res(struct ocfs2_lock_res *lockres) 1544ccd979bdSMark Fasheh { 1545ccd979bdSMark Fasheh unsigned long flags; 1546ccd979bdSMark Fasheh int status = 0; 1547ccd979bdSMark Fasheh 1548ccd979bdSMark Fasheh mlog_entry_void(); 1549ccd979bdSMark Fasheh 1550ccd979bdSMark Fasheh refresh_check: 1551ccd979bdSMark Fasheh spin_lock_irqsave(&lockres->l_lock, flags); 1552ccd979bdSMark Fasheh if (!(lockres->l_flags & OCFS2_LOCK_NEEDS_REFRESH)) { 1553ccd979bdSMark Fasheh spin_unlock_irqrestore(&lockres->l_lock, flags); 1554ccd979bdSMark Fasheh goto bail; 1555ccd979bdSMark Fasheh } 1556ccd979bdSMark Fasheh 1557ccd979bdSMark Fasheh if (lockres->l_flags & OCFS2_LOCK_REFRESHING) { 1558ccd979bdSMark Fasheh spin_unlock_irqrestore(&lockres->l_lock, flags); 1559ccd979bdSMark Fasheh 1560ccd979bdSMark Fasheh ocfs2_wait_on_refreshing_lock(lockres); 1561ccd979bdSMark Fasheh goto refresh_check; 1562ccd979bdSMark Fasheh } 1563ccd979bdSMark Fasheh 1564ccd979bdSMark Fasheh /* Ok, I'll be the one to refresh this lock. */ 1565ccd979bdSMark Fasheh lockres_or_flags(lockres, OCFS2_LOCK_REFRESHING); 1566ccd979bdSMark Fasheh spin_unlock_irqrestore(&lockres->l_lock, flags); 1567ccd979bdSMark Fasheh 1568ccd979bdSMark Fasheh status = 1; 1569ccd979bdSMark Fasheh bail: 1570ccd979bdSMark Fasheh mlog_exit(status); 1571ccd979bdSMark Fasheh return status; 1572ccd979bdSMark Fasheh } 1573ccd979bdSMark Fasheh 1574ccd979bdSMark Fasheh /* If status is non zero, I'll mark it as not being in refresh 1575ccd979bdSMark Fasheh * anymroe, but i won't clear the needs refresh flag. */ 1576ccd979bdSMark Fasheh static inline void ocfs2_complete_lock_res_refresh(struct ocfs2_lock_res *lockres, 1577ccd979bdSMark Fasheh int status) 1578ccd979bdSMark Fasheh { 1579ccd979bdSMark Fasheh unsigned long flags; 1580ccd979bdSMark Fasheh mlog_entry_void(); 1581ccd979bdSMark Fasheh 1582ccd979bdSMark Fasheh spin_lock_irqsave(&lockres->l_lock, flags); 1583ccd979bdSMark Fasheh lockres_clear_flags(lockres, OCFS2_LOCK_REFRESHING); 1584ccd979bdSMark Fasheh if (!status) 1585ccd979bdSMark Fasheh lockres_clear_flags(lockres, OCFS2_LOCK_NEEDS_REFRESH); 1586ccd979bdSMark Fasheh spin_unlock_irqrestore(&lockres->l_lock, flags); 1587ccd979bdSMark Fasheh 1588ccd979bdSMark Fasheh wake_up(&lockres->l_event); 1589ccd979bdSMark Fasheh 1590ccd979bdSMark Fasheh mlog_exit_void(); 1591ccd979bdSMark Fasheh } 1592ccd979bdSMark Fasheh 1593ccd979bdSMark Fasheh /* may or may not return a bh if it went to disk. */ 1594ccd979bdSMark Fasheh static int ocfs2_meta_lock_update(struct inode *inode, 1595ccd979bdSMark Fasheh struct buffer_head **bh) 1596ccd979bdSMark Fasheh { 1597ccd979bdSMark Fasheh int status = 0; 1598ccd979bdSMark Fasheh struct ocfs2_inode_info *oi = OCFS2_I(inode); 1599ccd979bdSMark Fasheh struct ocfs2_lock_res *lockres; 1600ccd979bdSMark Fasheh struct ocfs2_dinode *fe; 1601ccd979bdSMark Fasheh 1602ccd979bdSMark Fasheh mlog_entry_void(); 1603ccd979bdSMark Fasheh 1604ccd979bdSMark Fasheh spin_lock(&oi->ip_lock); 1605ccd979bdSMark Fasheh if (oi->ip_flags & OCFS2_INODE_DELETED) { 1606b0697053SMark Fasheh mlog(0, "Orphaned inode %llu was deleted while we " 1607ccd979bdSMark Fasheh "were waiting on a lock. ip_flags = 0x%x\n", 1608b0697053SMark Fasheh (unsigned long long)oi->ip_blkno, oi->ip_flags); 1609ccd979bdSMark Fasheh spin_unlock(&oi->ip_lock); 1610ccd979bdSMark Fasheh status = -ENOENT; 1611ccd979bdSMark Fasheh goto bail; 1612ccd979bdSMark Fasheh } 1613ccd979bdSMark Fasheh spin_unlock(&oi->ip_lock); 1614ccd979bdSMark Fasheh 1615ccd979bdSMark Fasheh lockres = &oi->ip_meta_lockres; 1616ccd979bdSMark Fasheh 1617ccd979bdSMark Fasheh if (!ocfs2_should_refresh_lock_res(lockres)) 1618ccd979bdSMark Fasheh goto bail; 1619ccd979bdSMark Fasheh 1620ccd979bdSMark Fasheh /* This will discard any caching information we might have had 1621ccd979bdSMark Fasheh * for the inode metadata. */ 1622ccd979bdSMark Fasheh ocfs2_metadata_cache_purge(inode); 1623ccd979bdSMark Fasheh 1624ccd979bdSMark Fasheh /* will do nothing for inode types that don't use the extent 1625ccd979bdSMark Fasheh * map (directories, bitmap files, etc) */ 1626ccd979bdSMark Fasheh ocfs2_extent_map_trunc(inode, 0); 1627ccd979bdSMark Fasheh 1628f9e2d82eSMark Fasheh if (ocfs2_meta_lvb_is_trustable(inode, lockres)) { 1629b0697053SMark Fasheh mlog(0, "Trusting LVB on inode %llu\n", 1630b0697053SMark Fasheh (unsigned long long)oi->ip_blkno); 1631ccd979bdSMark Fasheh ocfs2_refresh_inode_from_lvb(inode); 1632ccd979bdSMark Fasheh } else { 1633ccd979bdSMark Fasheh /* Boo, we have to go to disk. */ 1634ccd979bdSMark Fasheh /* read bh, cast, ocfs2_refresh_inode */ 1635ccd979bdSMark Fasheh status = ocfs2_read_block(OCFS2_SB(inode->i_sb), oi->ip_blkno, 1636ccd979bdSMark Fasheh bh, OCFS2_BH_CACHED, inode); 1637ccd979bdSMark Fasheh if (status < 0) { 1638ccd979bdSMark Fasheh mlog_errno(status); 1639ccd979bdSMark Fasheh goto bail_refresh; 1640ccd979bdSMark Fasheh } 1641ccd979bdSMark Fasheh fe = (struct ocfs2_dinode *) (*bh)->b_data; 1642ccd979bdSMark Fasheh 1643ccd979bdSMark Fasheh /* This is a good chance to make sure we're not 1644ccd979bdSMark Fasheh * locking an invalid object. 1645ccd979bdSMark Fasheh * 1646ccd979bdSMark Fasheh * We bug on a stale inode here because we checked 1647ccd979bdSMark Fasheh * above whether it was wiped from disk. The wiping 1648ccd979bdSMark Fasheh * node provides a guarantee that we receive that 1649ccd979bdSMark Fasheh * message and can mark the inode before dropping any 1650ccd979bdSMark Fasheh * locks associated with it. */ 1651ccd979bdSMark Fasheh if (!OCFS2_IS_VALID_DINODE(fe)) { 1652ccd979bdSMark Fasheh OCFS2_RO_ON_INVALID_DINODE(inode->i_sb, fe); 1653ccd979bdSMark Fasheh status = -EIO; 1654ccd979bdSMark Fasheh goto bail_refresh; 1655ccd979bdSMark Fasheh } 1656ccd979bdSMark Fasheh mlog_bug_on_msg(inode->i_generation != 1657ccd979bdSMark Fasheh le32_to_cpu(fe->i_generation), 1658b0697053SMark Fasheh "Invalid dinode %llu disk generation: %u " 1659ccd979bdSMark Fasheh "inode->i_generation: %u\n", 1660b0697053SMark Fasheh (unsigned long long)oi->ip_blkno, 1661b0697053SMark Fasheh le32_to_cpu(fe->i_generation), 1662ccd979bdSMark Fasheh inode->i_generation); 1663ccd979bdSMark Fasheh mlog_bug_on_msg(le64_to_cpu(fe->i_dtime) || 1664ccd979bdSMark Fasheh !(fe->i_flags & cpu_to_le32(OCFS2_VALID_FL)), 1665b0697053SMark Fasheh "Stale dinode %llu dtime: %llu flags: 0x%x\n", 1666b0697053SMark Fasheh (unsigned long long)oi->ip_blkno, 1667b0697053SMark Fasheh (unsigned long long)le64_to_cpu(fe->i_dtime), 1668ccd979bdSMark Fasheh le32_to_cpu(fe->i_flags)); 1669ccd979bdSMark Fasheh 1670ccd979bdSMark Fasheh ocfs2_refresh_inode(inode, fe); 1671ccd979bdSMark Fasheh } 1672ccd979bdSMark Fasheh 1673ccd979bdSMark Fasheh status = 0; 1674ccd979bdSMark Fasheh bail_refresh: 1675ccd979bdSMark Fasheh ocfs2_complete_lock_res_refresh(lockres, status); 1676ccd979bdSMark Fasheh bail: 1677ccd979bdSMark Fasheh mlog_exit(status); 1678ccd979bdSMark Fasheh return status; 1679ccd979bdSMark Fasheh } 1680ccd979bdSMark Fasheh 1681ccd979bdSMark Fasheh static int ocfs2_assign_bh(struct inode *inode, 1682ccd979bdSMark Fasheh struct buffer_head **ret_bh, 1683ccd979bdSMark Fasheh struct buffer_head *passed_bh) 1684ccd979bdSMark Fasheh { 1685ccd979bdSMark Fasheh int status; 1686ccd979bdSMark Fasheh 1687ccd979bdSMark Fasheh if (passed_bh) { 1688ccd979bdSMark Fasheh /* Ok, the update went to disk for us, use the 1689ccd979bdSMark Fasheh * returned bh. */ 1690ccd979bdSMark Fasheh *ret_bh = passed_bh; 1691ccd979bdSMark Fasheh get_bh(*ret_bh); 1692ccd979bdSMark Fasheh 1693ccd979bdSMark Fasheh return 0; 1694ccd979bdSMark Fasheh } 1695ccd979bdSMark Fasheh 1696ccd979bdSMark Fasheh status = ocfs2_read_block(OCFS2_SB(inode->i_sb), 1697ccd979bdSMark Fasheh OCFS2_I(inode)->ip_blkno, 1698ccd979bdSMark Fasheh ret_bh, 1699ccd979bdSMark Fasheh OCFS2_BH_CACHED, 1700ccd979bdSMark Fasheh inode); 1701ccd979bdSMark Fasheh if (status < 0) 1702ccd979bdSMark Fasheh mlog_errno(status); 1703ccd979bdSMark Fasheh 1704ccd979bdSMark Fasheh return status; 1705ccd979bdSMark Fasheh } 1706ccd979bdSMark Fasheh 1707ccd979bdSMark Fasheh /* 1708ccd979bdSMark Fasheh * returns < 0 error if the callback will never be called, otherwise 1709ccd979bdSMark Fasheh * the result of the lock will be communicated via the callback. 1710ccd979bdSMark Fasheh */ 1711ccd979bdSMark Fasheh int ocfs2_meta_lock_full(struct inode *inode, 1712ccd979bdSMark Fasheh struct ocfs2_journal_handle *handle, 1713ccd979bdSMark Fasheh struct buffer_head **ret_bh, 1714ccd979bdSMark Fasheh int ex, 1715ccd979bdSMark Fasheh int arg_flags) 1716ccd979bdSMark Fasheh { 1717ccd979bdSMark Fasheh int status, level, dlm_flags, acquired; 1718ccd979bdSMark Fasheh struct ocfs2_lock_res *lockres; 1719ccd979bdSMark Fasheh struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); 1720ccd979bdSMark Fasheh struct buffer_head *local_bh = NULL; 1721ccd979bdSMark Fasheh 1722ccd979bdSMark Fasheh BUG_ON(!inode); 1723ccd979bdSMark Fasheh 1724ccd979bdSMark Fasheh mlog_entry_void(); 1725ccd979bdSMark Fasheh 1726b0697053SMark Fasheh mlog(0, "inode %llu, take %s META lock\n", 1727b0697053SMark Fasheh (unsigned long long)OCFS2_I(inode)->ip_blkno, 1728ccd979bdSMark Fasheh ex ? "EXMODE" : "PRMODE"); 1729ccd979bdSMark Fasheh 1730ccd979bdSMark Fasheh status = 0; 1731ccd979bdSMark Fasheh acquired = 0; 1732ccd979bdSMark Fasheh /* We'll allow faking a readonly metadata lock for 1733ccd979bdSMark Fasheh * rodevices. */ 1734ccd979bdSMark Fasheh if (ocfs2_is_hard_readonly(osb)) { 1735ccd979bdSMark Fasheh if (ex) 1736ccd979bdSMark Fasheh status = -EROFS; 1737ccd979bdSMark Fasheh goto bail; 1738ccd979bdSMark Fasheh } 1739ccd979bdSMark Fasheh 1740ccd979bdSMark Fasheh if (!(arg_flags & OCFS2_META_LOCK_RECOVERY)) 1741ccd979bdSMark Fasheh wait_event(osb->recovery_event, 1742ccd979bdSMark Fasheh ocfs2_node_map_is_empty(osb, &osb->recovery_map)); 1743ccd979bdSMark Fasheh 1744ccd979bdSMark Fasheh acquired = 0; 1745ccd979bdSMark Fasheh lockres = &OCFS2_I(inode)->ip_meta_lockres; 1746ccd979bdSMark Fasheh level = ex ? LKM_EXMODE : LKM_PRMODE; 1747ccd979bdSMark Fasheh dlm_flags = 0; 1748ccd979bdSMark Fasheh if (arg_flags & OCFS2_META_LOCK_NOQUEUE) 1749ccd979bdSMark Fasheh dlm_flags |= LKM_NOQUEUE; 1750ccd979bdSMark Fasheh 1751ccd979bdSMark Fasheh status = ocfs2_cluster_lock(osb, lockres, level, dlm_flags, arg_flags); 1752ccd979bdSMark Fasheh if (status < 0) { 1753ccd979bdSMark Fasheh if (status != -EAGAIN && status != -EIOCBRETRY) 1754ccd979bdSMark Fasheh mlog_errno(status); 1755ccd979bdSMark Fasheh goto bail; 1756ccd979bdSMark Fasheh } 1757ccd979bdSMark Fasheh 1758ccd979bdSMark Fasheh /* Notify the error cleanup path to drop the cluster lock. */ 1759ccd979bdSMark Fasheh acquired = 1; 1760ccd979bdSMark Fasheh 1761ccd979bdSMark Fasheh /* We wait twice because a node may have died while we were in 1762ccd979bdSMark Fasheh * the lower dlm layers. The second time though, we've 1763ccd979bdSMark Fasheh * committed to owning this lock so we don't allow signals to 1764ccd979bdSMark Fasheh * abort the operation. */ 1765ccd979bdSMark Fasheh if (!(arg_flags & OCFS2_META_LOCK_RECOVERY)) 1766ccd979bdSMark Fasheh wait_event(osb->recovery_event, 1767ccd979bdSMark Fasheh ocfs2_node_map_is_empty(osb, &osb->recovery_map)); 1768ccd979bdSMark Fasheh 176924c19ef4SMark Fasheh /* 177024c19ef4SMark Fasheh * We only see this flag if we're being called from 177124c19ef4SMark Fasheh * ocfs2_read_locked_inode(). It means we're locking an inode 177224c19ef4SMark Fasheh * which hasn't been populated yet, so clear the refresh flag 177324c19ef4SMark Fasheh * and let the caller handle it. 177424c19ef4SMark Fasheh */ 177524c19ef4SMark Fasheh if (inode->i_state & I_NEW) { 177624c19ef4SMark Fasheh status = 0; 177724c19ef4SMark Fasheh ocfs2_complete_lock_res_refresh(lockres, 0); 177824c19ef4SMark Fasheh goto bail; 177924c19ef4SMark Fasheh } 178024c19ef4SMark Fasheh 1781ccd979bdSMark Fasheh /* This is fun. The caller may want a bh back, or it may 1782ccd979bdSMark Fasheh * not. ocfs2_meta_lock_update definitely wants one in, but 1783ccd979bdSMark Fasheh * may or may not read one, depending on what's in the 1784ccd979bdSMark Fasheh * LVB. The result of all of this is that we've *only* gone to 1785ccd979bdSMark Fasheh * disk if we have to, so the complexity is worthwhile. */ 1786ccd979bdSMark Fasheh status = ocfs2_meta_lock_update(inode, &local_bh); 1787ccd979bdSMark Fasheh if (status < 0) { 1788ccd979bdSMark Fasheh if (status != -ENOENT) 1789ccd979bdSMark Fasheh mlog_errno(status); 1790ccd979bdSMark Fasheh goto bail; 1791ccd979bdSMark Fasheh } 1792ccd979bdSMark Fasheh 1793ccd979bdSMark Fasheh if (ret_bh) { 1794ccd979bdSMark Fasheh status = ocfs2_assign_bh(inode, ret_bh, local_bh); 1795ccd979bdSMark Fasheh if (status < 0) { 1796ccd979bdSMark Fasheh mlog_errno(status); 1797ccd979bdSMark Fasheh goto bail; 1798ccd979bdSMark Fasheh } 1799ccd979bdSMark Fasheh } 1800ccd979bdSMark Fasheh 1801ccd979bdSMark Fasheh if (handle) { 1802ccd979bdSMark Fasheh status = ocfs2_handle_add_lock(handle, inode); 1803ccd979bdSMark Fasheh if (status < 0) 1804ccd979bdSMark Fasheh mlog_errno(status); 1805ccd979bdSMark Fasheh } 1806ccd979bdSMark Fasheh 1807ccd979bdSMark Fasheh bail: 1808ccd979bdSMark Fasheh if (status < 0) { 1809ccd979bdSMark Fasheh if (ret_bh && (*ret_bh)) { 1810ccd979bdSMark Fasheh brelse(*ret_bh); 1811ccd979bdSMark Fasheh *ret_bh = NULL; 1812ccd979bdSMark Fasheh } 1813ccd979bdSMark Fasheh if (acquired) 1814ccd979bdSMark Fasheh ocfs2_meta_unlock(inode, ex); 1815ccd979bdSMark Fasheh } 1816ccd979bdSMark Fasheh 1817ccd979bdSMark Fasheh if (local_bh) 1818ccd979bdSMark Fasheh brelse(local_bh); 1819ccd979bdSMark Fasheh 1820ccd979bdSMark Fasheh mlog_exit(status); 1821ccd979bdSMark Fasheh return status; 1822ccd979bdSMark Fasheh } 1823ccd979bdSMark Fasheh 1824ccd979bdSMark Fasheh /* 1825ccd979bdSMark Fasheh * This is working around a lock inversion between tasks acquiring DLM locks 1826ccd979bdSMark Fasheh * while holding a page lock and the vote thread which blocks dlm lock acquiry 1827ccd979bdSMark Fasheh * while acquiring page locks. 1828ccd979bdSMark Fasheh * 1829ccd979bdSMark Fasheh * ** These _with_page variantes are only intended to be called from aop 1830ccd979bdSMark Fasheh * methods that hold page locks and return a very specific *positive* error 1831ccd979bdSMark Fasheh * code that aop methods pass up to the VFS -- test for errors with != 0. ** 1832ccd979bdSMark Fasheh * 1833ccd979bdSMark Fasheh * The DLM is called such that it returns -EAGAIN if it would have blocked 1834ccd979bdSMark Fasheh * waiting for the vote thread. In that case we unlock our page so the vote 1835ccd979bdSMark Fasheh * thread can make progress. Once we've done this we have to return 1836ccd979bdSMark Fasheh * AOP_TRUNCATED_PAGE so the aop method that called us can bubble that back up 1837ccd979bdSMark Fasheh * into the VFS who will then immediately retry the aop call. 1838ccd979bdSMark Fasheh * 1839ccd979bdSMark Fasheh * We do a blocking lock and immediate unlock before returning, though, so that 1840ccd979bdSMark Fasheh * the lock has a great chance of being cached on this node by the time the VFS 1841ccd979bdSMark Fasheh * calls back to retry the aop. This has a potential to livelock as nodes 1842ccd979bdSMark Fasheh * ping locks back and forth, but that's a risk we're willing to take to avoid 1843ccd979bdSMark Fasheh * the lock inversion simply. 1844ccd979bdSMark Fasheh */ 1845ccd979bdSMark Fasheh int ocfs2_meta_lock_with_page(struct inode *inode, 1846ccd979bdSMark Fasheh struct ocfs2_journal_handle *handle, 1847ccd979bdSMark Fasheh struct buffer_head **ret_bh, 1848ccd979bdSMark Fasheh int ex, 1849ccd979bdSMark Fasheh struct page *page) 1850ccd979bdSMark Fasheh { 1851ccd979bdSMark Fasheh int ret; 1852ccd979bdSMark Fasheh 1853ccd979bdSMark Fasheh ret = ocfs2_meta_lock_full(inode, handle, ret_bh, ex, 1854ccd979bdSMark Fasheh OCFS2_LOCK_NONBLOCK); 1855ccd979bdSMark Fasheh if (ret == -EAGAIN) { 1856ccd979bdSMark Fasheh unlock_page(page); 1857ccd979bdSMark Fasheh if (ocfs2_meta_lock(inode, handle, ret_bh, ex) == 0) 1858ccd979bdSMark Fasheh ocfs2_meta_unlock(inode, ex); 1859ccd979bdSMark Fasheh ret = AOP_TRUNCATED_PAGE; 1860ccd979bdSMark Fasheh } 1861ccd979bdSMark Fasheh 1862ccd979bdSMark Fasheh return ret; 1863ccd979bdSMark Fasheh } 1864ccd979bdSMark Fasheh 1865ccd979bdSMark Fasheh void ocfs2_meta_unlock(struct inode *inode, 1866ccd979bdSMark Fasheh int ex) 1867ccd979bdSMark Fasheh { 1868ccd979bdSMark Fasheh int level = ex ? LKM_EXMODE : LKM_PRMODE; 1869ccd979bdSMark Fasheh struct ocfs2_lock_res *lockres = &OCFS2_I(inode)->ip_meta_lockres; 1870ccd979bdSMark Fasheh 1871ccd979bdSMark Fasheh mlog_entry_void(); 1872ccd979bdSMark Fasheh 1873b0697053SMark Fasheh mlog(0, "inode %llu drop %s META lock\n", 1874b0697053SMark Fasheh (unsigned long long)OCFS2_I(inode)->ip_blkno, 1875ccd979bdSMark Fasheh ex ? "EXMODE" : "PRMODE"); 1876ccd979bdSMark Fasheh 1877ccd979bdSMark Fasheh if (!ocfs2_is_hard_readonly(OCFS2_SB(inode->i_sb))) 1878ccd979bdSMark Fasheh ocfs2_cluster_unlock(OCFS2_SB(inode->i_sb), lockres, level); 1879ccd979bdSMark Fasheh 1880ccd979bdSMark Fasheh mlog_exit_void(); 1881ccd979bdSMark Fasheh } 1882ccd979bdSMark Fasheh 1883ccd979bdSMark Fasheh int ocfs2_super_lock(struct ocfs2_super *osb, 1884ccd979bdSMark Fasheh int ex) 1885ccd979bdSMark Fasheh { 1886ccd979bdSMark Fasheh int status; 1887ccd979bdSMark Fasheh int level = ex ? LKM_EXMODE : LKM_PRMODE; 1888ccd979bdSMark Fasheh struct ocfs2_lock_res *lockres = &osb->osb_super_lockres; 1889ccd979bdSMark Fasheh struct buffer_head *bh; 1890ccd979bdSMark Fasheh struct ocfs2_slot_info *si = osb->slot_info; 1891ccd979bdSMark Fasheh 1892ccd979bdSMark Fasheh mlog_entry_void(); 1893ccd979bdSMark Fasheh 1894ccd979bdSMark Fasheh if (ocfs2_is_hard_readonly(osb)) 1895ccd979bdSMark Fasheh return -EROFS; 1896ccd979bdSMark Fasheh 1897ccd979bdSMark Fasheh status = ocfs2_cluster_lock(osb, lockres, level, 0, 0); 1898ccd979bdSMark Fasheh if (status < 0) { 1899ccd979bdSMark Fasheh mlog_errno(status); 1900ccd979bdSMark Fasheh goto bail; 1901ccd979bdSMark Fasheh } 1902ccd979bdSMark Fasheh 1903ccd979bdSMark Fasheh /* The super block lock path is really in the best position to 1904ccd979bdSMark Fasheh * know when resources covered by the lock need to be 1905ccd979bdSMark Fasheh * refreshed, so we do it here. Of course, making sense of 1906ccd979bdSMark Fasheh * everything is up to the caller :) */ 1907ccd979bdSMark Fasheh status = ocfs2_should_refresh_lock_res(lockres); 1908ccd979bdSMark Fasheh if (status < 0) { 1909ccd979bdSMark Fasheh mlog_errno(status); 1910ccd979bdSMark Fasheh goto bail; 1911ccd979bdSMark Fasheh } 1912ccd979bdSMark Fasheh if (status) { 1913ccd979bdSMark Fasheh bh = si->si_bh; 1914ccd979bdSMark Fasheh status = ocfs2_read_block(osb, bh->b_blocknr, &bh, 0, 1915ccd979bdSMark Fasheh si->si_inode); 1916ccd979bdSMark Fasheh if (status == 0) 1917ccd979bdSMark Fasheh ocfs2_update_slot_info(si); 1918ccd979bdSMark Fasheh 1919ccd979bdSMark Fasheh ocfs2_complete_lock_res_refresh(lockres, status); 1920ccd979bdSMark Fasheh 1921ccd979bdSMark Fasheh if (status < 0) 1922ccd979bdSMark Fasheh mlog_errno(status); 1923ccd979bdSMark Fasheh } 1924ccd979bdSMark Fasheh bail: 1925ccd979bdSMark Fasheh mlog_exit(status); 1926ccd979bdSMark Fasheh return status; 1927ccd979bdSMark Fasheh } 1928ccd979bdSMark Fasheh 1929ccd979bdSMark Fasheh void ocfs2_super_unlock(struct ocfs2_super *osb, 1930ccd979bdSMark Fasheh int ex) 1931ccd979bdSMark Fasheh { 1932ccd979bdSMark Fasheh int level = ex ? LKM_EXMODE : LKM_PRMODE; 1933ccd979bdSMark Fasheh struct ocfs2_lock_res *lockres = &osb->osb_super_lockres; 1934ccd979bdSMark Fasheh 1935ccd979bdSMark Fasheh ocfs2_cluster_unlock(osb, lockres, level); 1936ccd979bdSMark Fasheh } 1937ccd979bdSMark Fasheh 1938ccd979bdSMark Fasheh int ocfs2_rename_lock(struct ocfs2_super *osb) 1939ccd979bdSMark Fasheh { 1940ccd979bdSMark Fasheh int status; 1941ccd979bdSMark Fasheh struct ocfs2_lock_res *lockres = &osb->osb_rename_lockres; 1942ccd979bdSMark Fasheh 1943ccd979bdSMark Fasheh if (ocfs2_is_hard_readonly(osb)) 1944ccd979bdSMark Fasheh return -EROFS; 1945ccd979bdSMark Fasheh 1946ccd979bdSMark Fasheh status = ocfs2_cluster_lock(osb, lockres, LKM_EXMODE, 0, 0); 1947ccd979bdSMark Fasheh if (status < 0) 1948ccd979bdSMark Fasheh mlog_errno(status); 1949ccd979bdSMark Fasheh 1950ccd979bdSMark Fasheh return status; 1951ccd979bdSMark Fasheh } 1952ccd979bdSMark Fasheh 1953ccd979bdSMark Fasheh void ocfs2_rename_unlock(struct ocfs2_super *osb) 1954ccd979bdSMark Fasheh { 1955ccd979bdSMark Fasheh struct ocfs2_lock_res *lockres = &osb->osb_rename_lockres; 1956ccd979bdSMark Fasheh 1957ccd979bdSMark Fasheh ocfs2_cluster_unlock(osb, lockres, LKM_EXMODE); 1958ccd979bdSMark Fasheh } 1959ccd979bdSMark Fasheh 1960d680efe9SMark Fasheh int ocfs2_dentry_lock(struct dentry *dentry, int ex) 1961d680efe9SMark Fasheh { 1962d680efe9SMark Fasheh int ret; 1963d680efe9SMark Fasheh int level = ex ? LKM_EXMODE : LKM_PRMODE; 1964d680efe9SMark Fasheh struct ocfs2_dentry_lock *dl = dentry->d_fsdata; 1965d680efe9SMark Fasheh struct ocfs2_super *osb = OCFS2_SB(dentry->d_sb); 1966d680efe9SMark Fasheh 1967d680efe9SMark Fasheh BUG_ON(!dl); 1968d680efe9SMark Fasheh 1969d680efe9SMark Fasheh if (ocfs2_is_hard_readonly(osb)) 1970d680efe9SMark Fasheh return -EROFS; 1971d680efe9SMark Fasheh 1972d680efe9SMark Fasheh ret = ocfs2_cluster_lock(osb, &dl->dl_lockres, level, 0, 0); 1973d680efe9SMark Fasheh if (ret < 0) 1974d680efe9SMark Fasheh mlog_errno(ret); 1975d680efe9SMark Fasheh 1976d680efe9SMark Fasheh return ret; 1977d680efe9SMark Fasheh } 1978d680efe9SMark Fasheh 1979d680efe9SMark Fasheh void ocfs2_dentry_unlock(struct dentry *dentry, int ex) 1980d680efe9SMark Fasheh { 1981d680efe9SMark Fasheh int level = ex ? LKM_EXMODE : LKM_PRMODE; 1982d680efe9SMark Fasheh struct ocfs2_dentry_lock *dl = dentry->d_fsdata; 1983d680efe9SMark Fasheh struct ocfs2_super *osb = OCFS2_SB(dentry->d_sb); 1984d680efe9SMark Fasheh 1985d680efe9SMark Fasheh ocfs2_cluster_unlock(osb, &dl->dl_lockres, level); 1986d680efe9SMark Fasheh } 1987d680efe9SMark Fasheh 1988ccd979bdSMark Fasheh /* Reference counting of the dlm debug structure. We want this because 1989ccd979bdSMark Fasheh * open references on the debug inodes can live on after a mount, so 1990ccd979bdSMark Fasheh * we can't rely on the ocfs2_super to always exist. */ 1991ccd979bdSMark Fasheh static void ocfs2_dlm_debug_free(struct kref *kref) 1992ccd979bdSMark Fasheh { 1993ccd979bdSMark Fasheh struct ocfs2_dlm_debug *dlm_debug; 1994ccd979bdSMark Fasheh 1995ccd979bdSMark Fasheh dlm_debug = container_of(kref, struct ocfs2_dlm_debug, d_refcnt); 1996ccd979bdSMark Fasheh 1997ccd979bdSMark Fasheh kfree(dlm_debug); 1998ccd979bdSMark Fasheh } 1999ccd979bdSMark Fasheh 2000ccd979bdSMark Fasheh void ocfs2_put_dlm_debug(struct ocfs2_dlm_debug *dlm_debug) 2001ccd979bdSMark Fasheh { 2002ccd979bdSMark Fasheh if (dlm_debug) 2003ccd979bdSMark Fasheh kref_put(&dlm_debug->d_refcnt, ocfs2_dlm_debug_free); 2004ccd979bdSMark Fasheh } 2005ccd979bdSMark Fasheh 2006ccd979bdSMark Fasheh static void ocfs2_get_dlm_debug(struct ocfs2_dlm_debug *debug) 2007ccd979bdSMark Fasheh { 2008ccd979bdSMark Fasheh kref_get(&debug->d_refcnt); 2009ccd979bdSMark Fasheh } 2010ccd979bdSMark Fasheh 2011ccd979bdSMark Fasheh struct ocfs2_dlm_debug *ocfs2_new_dlm_debug(void) 2012ccd979bdSMark Fasheh { 2013ccd979bdSMark Fasheh struct ocfs2_dlm_debug *dlm_debug; 2014ccd979bdSMark Fasheh 2015ccd979bdSMark Fasheh dlm_debug = kmalloc(sizeof(struct ocfs2_dlm_debug), GFP_KERNEL); 2016ccd979bdSMark Fasheh if (!dlm_debug) { 2017ccd979bdSMark Fasheh mlog_errno(-ENOMEM); 2018ccd979bdSMark Fasheh goto out; 2019ccd979bdSMark Fasheh } 2020ccd979bdSMark Fasheh 2021ccd979bdSMark Fasheh kref_init(&dlm_debug->d_refcnt); 2022ccd979bdSMark Fasheh INIT_LIST_HEAD(&dlm_debug->d_lockres_tracking); 2023ccd979bdSMark Fasheh dlm_debug->d_locking_state = NULL; 2024ccd979bdSMark Fasheh out: 2025ccd979bdSMark Fasheh return dlm_debug; 2026ccd979bdSMark Fasheh } 2027ccd979bdSMark Fasheh 2028ccd979bdSMark Fasheh /* Access to this is arbitrated for us via seq_file->sem. */ 2029ccd979bdSMark Fasheh struct ocfs2_dlm_seq_priv { 2030ccd979bdSMark Fasheh struct ocfs2_dlm_debug *p_dlm_debug; 2031ccd979bdSMark Fasheh struct ocfs2_lock_res p_iter_res; 2032ccd979bdSMark Fasheh struct ocfs2_lock_res p_tmp_res; 2033ccd979bdSMark Fasheh }; 2034ccd979bdSMark Fasheh 2035ccd979bdSMark Fasheh static struct ocfs2_lock_res *ocfs2_dlm_next_res(struct ocfs2_lock_res *start, 2036ccd979bdSMark Fasheh struct ocfs2_dlm_seq_priv *priv) 2037ccd979bdSMark Fasheh { 2038ccd979bdSMark Fasheh struct ocfs2_lock_res *iter, *ret = NULL; 2039ccd979bdSMark Fasheh struct ocfs2_dlm_debug *dlm_debug = priv->p_dlm_debug; 2040ccd979bdSMark Fasheh 2041ccd979bdSMark Fasheh assert_spin_locked(&ocfs2_dlm_tracking_lock); 2042ccd979bdSMark Fasheh 2043ccd979bdSMark Fasheh list_for_each_entry(iter, &start->l_debug_list, l_debug_list) { 2044ccd979bdSMark Fasheh /* discover the head of the list */ 2045ccd979bdSMark Fasheh if (&iter->l_debug_list == &dlm_debug->d_lockres_tracking) { 2046ccd979bdSMark Fasheh mlog(0, "End of list found, %p\n", ret); 2047ccd979bdSMark Fasheh break; 2048ccd979bdSMark Fasheh } 2049ccd979bdSMark Fasheh 2050ccd979bdSMark Fasheh /* We track our "dummy" iteration lockres' by a NULL 2051ccd979bdSMark Fasheh * l_ops field. */ 2052ccd979bdSMark Fasheh if (iter->l_ops != NULL) { 2053ccd979bdSMark Fasheh ret = iter; 2054ccd979bdSMark Fasheh break; 2055ccd979bdSMark Fasheh } 2056ccd979bdSMark Fasheh } 2057ccd979bdSMark Fasheh 2058ccd979bdSMark Fasheh return ret; 2059ccd979bdSMark Fasheh } 2060ccd979bdSMark Fasheh 2061ccd979bdSMark Fasheh static void *ocfs2_dlm_seq_start(struct seq_file *m, loff_t *pos) 2062ccd979bdSMark Fasheh { 2063ccd979bdSMark Fasheh struct ocfs2_dlm_seq_priv *priv = m->private; 2064ccd979bdSMark Fasheh struct ocfs2_lock_res *iter; 2065ccd979bdSMark Fasheh 2066ccd979bdSMark Fasheh spin_lock(&ocfs2_dlm_tracking_lock); 2067ccd979bdSMark Fasheh iter = ocfs2_dlm_next_res(&priv->p_iter_res, priv); 2068ccd979bdSMark Fasheh if (iter) { 2069ccd979bdSMark Fasheh /* Since lockres' have the lifetime of their container 2070ccd979bdSMark Fasheh * (which can be inodes, ocfs2_supers, etc) we want to 2071ccd979bdSMark Fasheh * copy this out to a temporary lockres while still 2072ccd979bdSMark Fasheh * under the spinlock. Obviously after this we can't 2073ccd979bdSMark Fasheh * trust any pointers on the copy returned, but that's 2074ccd979bdSMark Fasheh * ok as the information we want isn't typically held 2075ccd979bdSMark Fasheh * in them. */ 2076ccd979bdSMark Fasheh priv->p_tmp_res = *iter; 2077ccd979bdSMark Fasheh iter = &priv->p_tmp_res; 2078ccd979bdSMark Fasheh } 2079ccd979bdSMark Fasheh spin_unlock(&ocfs2_dlm_tracking_lock); 2080ccd979bdSMark Fasheh 2081ccd979bdSMark Fasheh return iter; 2082ccd979bdSMark Fasheh } 2083ccd979bdSMark Fasheh 2084ccd979bdSMark Fasheh static void ocfs2_dlm_seq_stop(struct seq_file *m, void *v) 2085ccd979bdSMark Fasheh { 2086ccd979bdSMark Fasheh } 2087ccd979bdSMark Fasheh 2088ccd979bdSMark Fasheh static void *ocfs2_dlm_seq_next(struct seq_file *m, void *v, loff_t *pos) 2089ccd979bdSMark Fasheh { 2090ccd979bdSMark Fasheh struct ocfs2_dlm_seq_priv *priv = m->private; 2091ccd979bdSMark Fasheh struct ocfs2_lock_res *iter = v; 2092ccd979bdSMark Fasheh struct ocfs2_lock_res *dummy = &priv->p_iter_res; 2093ccd979bdSMark Fasheh 2094ccd979bdSMark Fasheh spin_lock(&ocfs2_dlm_tracking_lock); 2095ccd979bdSMark Fasheh iter = ocfs2_dlm_next_res(iter, priv); 2096ccd979bdSMark Fasheh list_del_init(&dummy->l_debug_list); 2097ccd979bdSMark Fasheh if (iter) { 2098ccd979bdSMark Fasheh list_add(&dummy->l_debug_list, &iter->l_debug_list); 2099ccd979bdSMark Fasheh priv->p_tmp_res = *iter; 2100ccd979bdSMark Fasheh iter = &priv->p_tmp_res; 2101ccd979bdSMark Fasheh } 2102ccd979bdSMark Fasheh spin_unlock(&ocfs2_dlm_tracking_lock); 2103ccd979bdSMark Fasheh 2104ccd979bdSMark Fasheh return iter; 2105ccd979bdSMark Fasheh } 2106ccd979bdSMark Fasheh 2107ccd979bdSMark Fasheh /* So that debugfs.ocfs2 can determine which format is being used */ 2108ccd979bdSMark Fasheh #define OCFS2_DLM_DEBUG_STR_VERSION 1 2109ccd979bdSMark Fasheh static int ocfs2_dlm_seq_show(struct seq_file *m, void *v) 2110ccd979bdSMark Fasheh { 2111ccd979bdSMark Fasheh int i; 2112ccd979bdSMark Fasheh char *lvb; 2113ccd979bdSMark Fasheh struct ocfs2_lock_res *lockres = v; 2114ccd979bdSMark Fasheh 2115ccd979bdSMark Fasheh if (!lockres) 2116ccd979bdSMark Fasheh return -EINVAL; 2117ccd979bdSMark Fasheh 2118d680efe9SMark Fasheh seq_printf(m, "0x%x\t", OCFS2_DLM_DEBUG_STR_VERSION); 2119d680efe9SMark Fasheh 2120d680efe9SMark Fasheh if (lockres->l_type == OCFS2_LOCK_TYPE_DENTRY) 2121d680efe9SMark Fasheh seq_printf(m, "%.*s%08x\t", OCFS2_DENTRY_LOCK_INO_START - 1, 2122d680efe9SMark Fasheh lockres->l_name, 2123d680efe9SMark Fasheh (unsigned int)ocfs2_get_dentry_lock_ino(lockres)); 2124d680efe9SMark Fasheh else 2125d680efe9SMark Fasheh seq_printf(m, "%.*s\t", OCFS2_LOCK_ID_MAX_LEN, lockres->l_name); 2126d680efe9SMark Fasheh 2127d680efe9SMark Fasheh seq_printf(m, "%d\t" 2128ccd979bdSMark Fasheh "0x%lx\t" 2129ccd979bdSMark Fasheh "0x%x\t" 2130ccd979bdSMark Fasheh "0x%x\t" 2131ccd979bdSMark Fasheh "%u\t" 2132ccd979bdSMark Fasheh "%u\t" 2133ccd979bdSMark Fasheh "%d\t" 2134ccd979bdSMark Fasheh "%d\t", 2135ccd979bdSMark Fasheh lockres->l_level, 2136ccd979bdSMark Fasheh lockres->l_flags, 2137ccd979bdSMark Fasheh lockres->l_action, 2138ccd979bdSMark Fasheh lockres->l_unlock_action, 2139ccd979bdSMark Fasheh lockres->l_ro_holders, 2140ccd979bdSMark Fasheh lockres->l_ex_holders, 2141ccd979bdSMark Fasheh lockres->l_requested, 2142ccd979bdSMark Fasheh lockres->l_blocking); 2143ccd979bdSMark Fasheh 2144ccd979bdSMark Fasheh /* Dump the raw LVB */ 2145ccd979bdSMark Fasheh lvb = lockres->l_lksb.lvb; 2146ccd979bdSMark Fasheh for(i = 0; i < DLM_LVB_LEN; i++) 2147ccd979bdSMark Fasheh seq_printf(m, "0x%x\t", lvb[i]); 2148ccd979bdSMark Fasheh 2149ccd979bdSMark Fasheh /* End the line */ 2150ccd979bdSMark Fasheh seq_printf(m, "\n"); 2151ccd979bdSMark Fasheh return 0; 2152ccd979bdSMark Fasheh } 2153ccd979bdSMark Fasheh 2154ccd979bdSMark Fasheh static struct seq_operations ocfs2_dlm_seq_ops = { 2155ccd979bdSMark Fasheh .start = ocfs2_dlm_seq_start, 2156ccd979bdSMark Fasheh .stop = ocfs2_dlm_seq_stop, 2157ccd979bdSMark Fasheh .next = ocfs2_dlm_seq_next, 2158ccd979bdSMark Fasheh .show = ocfs2_dlm_seq_show, 2159ccd979bdSMark Fasheh }; 2160ccd979bdSMark Fasheh 2161ccd979bdSMark Fasheh static int ocfs2_dlm_debug_release(struct inode *inode, struct file *file) 2162ccd979bdSMark Fasheh { 2163ccd979bdSMark Fasheh struct seq_file *seq = (struct seq_file *) file->private_data; 2164ccd979bdSMark Fasheh struct ocfs2_dlm_seq_priv *priv = seq->private; 2165ccd979bdSMark Fasheh struct ocfs2_lock_res *res = &priv->p_iter_res; 2166ccd979bdSMark Fasheh 2167ccd979bdSMark Fasheh ocfs2_remove_lockres_tracking(res); 2168ccd979bdSMark Fasheh ocfs2_put_dlm_debug(priv->p_dlm_debug); 2169ccd979bdSMark Fasheh return seq_release_private(inode, file); 2170ccd979bdSMark Fasheh } 2171ccd979bdSMark Fasheh 2172ccd979bdSMark Fasheh static int ocfs2_dlm_debug_open(struct inode *inode, struct file *file) 2173ccd979bdSMark Fasheh { 2174ccd979bdSMark Fasheh int ret; 2175ccd979bdSMark Fasheh struct ocfs2_dlm_seq_priv *priv; 2176ccd979bdSMark Fasheh struct seq_file *seq; 2177ccd979bdSMark Fasheh struct ocfs2_super *osb; 2178ccd979bdSMark Fasheh 2179ccd979bdSMark Fasheh priv = kzalloc(sizeof(struct ocfs2_dlm_seq_priv), GFP_KERNEL); 2180ccd979bdSMark Fasheh if (!priv) { 2181ccd979bdSMark Fasheh ret = -ENOMEM; 2182ccd979bdSMark Fasheh mlog_errno(ret); 2183ccd979bdSMark Fasheh goto out; 2184ccd979bdSMark Fasheh } 2185ccd979bdSMark Fasheh osb = (struct ocfs2_super *) inode->u.generic_ip; 2186ccd979bdSMark Fasheh ocfs2_get_dlm_debug(osb->osb_dlm_debug); 2187ccd979bdSMark Fasheh priv->p_dlm_debug = osb->osb_dlm_debug; 2188ccd979bdSMark Fasheh INIT_LIST_HEAD(&priv->p_iter_res.l_debug_list); 2189ccd979bdSMark Fasheh 2190ccd979bdSMark Fasheh ret = seq_open(file, &ocfs2_dlm_seq_ops); 2191ccd979bdSMark Fasheh if (ret) { 2192ccd979bdSMark Fasheh kfree(priv); 2193ccd979bdSMark Fasheh mlog_errno(ret); 2194ccd979bdSMark Fasheh goto out; 2195ccd979bdSMark Fasheh } 2196ccd979bdSMark Fasheh 2197ccd979bdSMark Fasheh seq = (struct seq_file *) file->private_data; 2198ccd979bdSMark Fasheh seq->private = priv; 2199ccd979bdSMark Fasheh 2200ccd979bdSMark Fasheh ocfs2_add_lockres_tracking(&priv->p_iter_res, 2201ccd979bdSMark Fasheh priv->p_dlm_debug); 2202ccd979bdSMark Fasheh 2203ccd979bdSMark Fasheh out: 2204ccd979bdSMark Fasheh return ret; 2205ccd979bdSMark Fasheh } 2206ccd979bdSMark Fasheh 22074b6f5d20SArjan van de Ven static const struct file_operations ocfs2_dlm_debug_fops = { 2208ccd979bdSMark Fasheh .open = ocfs2_dlm_debug_open, 2209ccd979bdSMark Fasheh .release = ocfs2_dlm_debug_release, 2210ccd979bdSMark Fasheh .read = seq_read, 2211ccd979bdSMark Fasheh .llseek = seq_lseek, 2212ccd979bdSMark Fasheh }; 2213ccd979bdSMark Fasheh 2214ccd979bdSMark Fasheh static int ocfs2_dlm_init_debug(struct ocfs2_super *osb) 2215ccd979bdSMark Fasheh { 2216ccd979bdSMark Fasheh int ret = 0; 2217ccd979bdSMark Fasheh struct ocfs2_dlm_debug *dlm_debug = osb->osb_dlm_debug; 2218ccd979bdSMark Fasheh 2219ccd979bdSMark Fasheh dlm_debug->d_locking_state = debugfs_create_file("locking_state", 2220ccd979bdSMark Fasheh S_IFREG|S_IRUSR, 2221ccd979bdSMark Fasheh osb->osb_debug_root, 2222ccd979bdSMark Fasheh osb, 2223ccd979bdSMark Fasheh &ocfs2_dlm_debug_fops); 2224ccd979bdSMark Fasheh if (!dlm_debug->d_locking_state) { 2225ccd979bdSMark Fasheh ret = -EINVAL; 2226ccd979bdSMark Fasheh mlog(ML_ERROR, 2227ccd979bdSMark Fasheh "Unable to create locking state debugfs file.\n"); 2228ccd979bdSMark Fasheh goto out; 2229ccd979bdSMark Fasheh } 2230ccd979bdSMark Fasheh 2231ccd979bdSMark Fasheh ocfs2_get_dlm_debug(dlm_debug); 2232ccd979bdSMark Fasheh out: 2233ccd979bdSMark Fasheh return ret; 2234ccd979bdSMark Fasheh } 2235ccd979bdSMark Fasheh 2236ccd979bdSMark Fasheh static void ocfs2_dlm_shutdown_debug(struct ocfs2_super *osb) 2237ccd979bdSMark Fasheh { 2238ccd979bdSMark Fasheh struct ocfs2_dlm_debug *dlm_debug = osb->osb_dlm_debug; 2239ccd979bdSMark Fasheh 2240ccd979bdSMark Fasheh if (dlm_debug) { 2241ccd979bdSMark Fasheh debugfs_remove(dlm_debug->d_locking_state); 2242ccd979bdSMark Fasheh ocfs2_put_dlm_debug(dlm_debug); 2243ccd979bdSMark Fasheh } 2244ccd979bdSMark Fasheh } 2245ccd979bdSMark Fasheh 2246ccd979bdSMark Fasheh int ocfs2_dlm_init(struct ocfs2_super *osb) 2247ccd979bdSMark Fasheh { 2248ccd979bdSMark Fasheh int status; 2249ccd979bdSMark Fasheh u32 dlm_key; 2250ccd979bdSMark Fasheh struct dlm_ctxt *dlm; 2251ccd979bdSMark Fasheh 2252ccd979bdSMark Fasheh mlog_entry_void(); 2253ccd979bdSMark Fasheh 2254ccd979bdSMark Fasheh status = ocfs2_dlm_init_debug(osb); 2255ccd979bdSMark Fasheh if (status < 0) { 2256ccd979bdSMark Fasheh mlog_errno(status); 2257ccd979bdSMark Fasheh goto bail; 2258ccd979bdSMark Fasheh } 2259ccd979bdSMark Fasheh 2260ccd979bdSMark Fasheh /* launch vote thread */ 226178427043SMark Fasheh osb->vote_task = kthread_run(ocfs2_vote_thread, osb, "ocfs2vote"); 2262ccd979bdSMark Fasheh if (IS_ERR(osb->vote_task)) { 2263ccd979bdSMark Fasheh status = PTR_ERR(osb->vote_task); 2264ccd979bdSMark Fasheh osb->vote_task = NULL; 2265ccd979bdSMark Fasheh mlog_errno(status); 2266ccd979bdSMark Fasheh goto bail; 2267ccd979bdSMark Fasheh } 2268ccd979bdSMark Fasheh 2269ccd979bdSMark Fasheh /* used by the dlm code to make message headers unique, each 2270ccd979bdSMark Fasheh * node in this domain must agree on this. */ 2271ccd979bdSMark Fasheh dlm_key = crc32_le(0, osb->uuid_str, strlen(osb->uuid_str)); 2272ccd979bdSMark Fasheh 2273ccd979bdSMark Fasheh /* for now, uuid == domain */ 2274ccd979bdSMark Fasheh dlm = dlm_register_domain(osb->uuid_str, dlm_key); 2275ccd979bdSMark Fasheh if (IS_ERR(dlm)) { 2276ccd979bdSMark Fasheh status = PTR_ERR(dlm); 2277ccd979bdSMark Fasheh mlog_errno(status); 2278ccd979bdSMark Fasheh goto bail; 2279ccd979bdSMark Fasheh } 2280ccd979bdSMark Fasheh 2281ccd979bdSMark Fasheh ocfs2_super_lock_res_init(&osb->osb_super_lockres, osb); 2282ccd979bdSMark Fasheh ocfs2_rename_lock_res_init(&osb->osb_rename_lockres, osb); 2283ccd979bdSMark Fasheh 2284ccd979bdSMark Fasheh dlm_register_eviction_cb(dlm, &osb->osb_eviction_cb); 2285ccd979bdSMark Fasheh 2286ccd979bdSMark Fasheh osb->dlm = dlm; 2287ccd979bdSMark Fasheh 2288ccd979bdSMark Fasheh status = 0; 2289ccd979bdSMark Fasheh bail: 2290ccd979bdSMark Fasheh if (status < 0) { 2291ccd979bdSMark Fasheh ocfs2_dlm_shutdown_debug(osb); 2292ccd979bdSMark Fasheh if (osb->vote_task) 2293ccd979bdSMark Fasheh kthread_stop(osb->vote_task); 2294ccd979bdSMark Fasheh } 2295ccd979bdSMark Fasheh 2296ccd979bdSMark Fasheh mlog_exit(status); 2297ccd979bdSMark Fasheh return status; 2298ccd979bdSMark Fasheh } 2299ccd979bdSMark Fasheh 2300ccd979bdSMark Fasheh void ocfs2_dlm_shutdown(struct ocfs2_super *osb) 2301ccd979bdSMark Fasheh { 2302ccd979bdSMark Fasheh mlog_entry_void(); 2303ccd979bdSMark Fasheh 2304ccd979bdSMark Fasheh dlm_unregister_eviction_cb(&osb->osb_eviction_cb); 2305ccd979bdSMark Fasheh 2306ccd979bdSMark Fasheh ocfs2_drop_osb_locks(osb); 2307ccd979bdSMark Fasheh 2308ccd979bdSMark Fasheh if (osb->vote_task) { 2309ccd979bdSMark Fasheh kthread_stop(osb->vote_task); 2310ccd979bdSMark Fasheh osb->vote_task = NULL; 2311ccd979bdSMark Fasheh } 2312ccd979bdSMark Fasheh 2313ccd979bdSMark Fasheh ocfs2_lock_res_free(&osb->osb_super_lockres); 2314ccd979bdSMark Fasheh ocfs2_lock_res_free(&osb->osb_rename_lockres); 2315ccd979bdSMark Fasheh 2316ccd979bdSMark Fasheh dlm_unregister_domain(osb->dlm); 2317ccd979bdSMark Fasheh osb->dlm = NULL; 2318ccd979bdSMark Fasheh 2319ccd979bdSMark Fasheh ocfs2_dlm_shutdown_debug(osb); 2320ccd979bdSMark Fasheh 2321ccd979bdSMark Fasheh mlog_exit_void(); 2322ccd979bdSMark Fasheh } 2323ccd979bdSMark Fasheh 2324ccd979bdSMark Fasheh static void ocfs2_unlock_ast_func(void *opaque, enum dlm_status status) 2325ccd979bdSMark Fasheh { 2326ccd979bdSMark Fasheh struct ocfs2_lock_res *lockres = opaque; 2327ccd979bdSMark Fasheh unsigned long flags; 2328ccd979bdSMark Fasheh 2329ccd979bdSMark Fasheh mlog_entry_void(); 2330ccd979bdSMark Fasheh 2331ccd979bdSMark Fasheh mlog(0, "UNLOCK AST called on lock %s, action = %d\n", lockres->l_name, 2332ccd979bdSMark Fasheh lockres->l_unlock_action); 2333ccd979bdSMark Fasheh 2334ccd979bdSMark Fasheh spin_lock_irqsave(&lockres->l_lock, flags); 2335ccd979bdSMark Fasheh /* We tried to cancel a convert request, but it was already 2336ccd979bdSMark Fasheh * granted. All we want to do here is clear our unlock 2337ccd979bdSMark Fasheh * state. The wake_up call done at the bottom is redundant 2338ccd979bdSMark Fasheh * (ocfs2_prepare_cancel_convert doesn't sleep on this) but doesn't 2339ccd979bdSMark Fasheh * hurt anything anyway */ 2340ccd979bdSMark Fasheh if (status == DLM_CANCELGRANT && 2341ccd979bdSMark Fasheh lockres->l_unlock_action == OCFS2_UNLOCK_CANCEL_CONVERT) { 2342ccd979bdSMark Fasheh mlog(0, "Got cancelgrant for %s\n", lockres->l_name); 2343ccd979bdSMark Fasheh 2344ccd979bdSMark Fasheh /* We don't clear the busy flag in this case as it 2345ccd979bdSMark Fasheh * should have been cleared by the ast which the dlm 2346ccd979bdSMark Fasheh * has called. */ 2347ccd979bdSMark Fasheh goto complete_unlock; 2348ccd979bdSMark Fasheh } 2349ccd979bdSMark Fasheh 2350ccd979bdSMark Fasheh if (status != DLM_NORMAL) { 2351ccd979bdSMark Fasheh mlog(ML_ERROR, "Dlm passes status %d for lock %s, " 2352ccd979bdSMark Fasheh "unlock_action %d\n", status, lockres->l_name, 2353ccd979bdSMark Fasheh lockres->l_unlock_action); 2354ccd979bdSMark Fasheh spin_unlock_irqrestore(&lockres->l_lock, flags); 2355ccd979bdSMark Fasheh return; 2356ccd979bdSMark Fasheh } 2357ccd979bdSMark Fasheh 2358ccd979bdSMark Fasheh switch(lockres->l_unlock_action) { 2359ccd979bdSMark Fasheh case OCFS2_UNLOCK_CANCEL_CONVERT: 2360ccd979bdSMark Fasheh mlog(0, "Cancel convert success for %s\n", lockres->l_name); 2361ccd979bdSMark Fasheh lockres->l_action = OCFS2_AST_INVALID; 2362ccd979bdSMark Fasheh break; 2363ccd979bdSMark Fasheh case OCFS2_UNLOCK_DROP_LOCK: 2364ccd979bdSMark Fasheh lockres->l_level = LKM_IVMODE; 2365ccd979bdSMark Fasheh break; 2366ccd979bdSMark Fasheh default: 2367ccd979bdSMark Fasheh BUG(); 2368ccd979bdSMark Fasheh } 2369ccd979bdSMark Fasheh 2370ccd979bdSMark Fasheh lockres_clear_flags(lockres, OCFS2_LOCK_BUSY); 2371ccd979bdSMark Fasheh complete_unlock: 2372ccd979bdSMark Fasheh lockres->l_unlock_action = OCFS2_UNLOCK_INVALID; 2373ccd979bdSMark Fasheh spin_unlock_irqrestore(&lockres->l_lock, flags); 2374ccd979bdSMark Fasheh 2375ccd979bdSMark Fasheh wake_up(&lockres->l_event); 2376ccd979bdSMark Fasheh 2377ccd979bdSMark Fasheh mlog_exit_void(); 2378ccd979bdSMark Fasheh } 2379ccd979bdSMark Fasheh 2380ccd979bdSMark Fasheh typedef void (ocfs2_pre_drop_cb_t)(struct ocfs2_lock_res *, void *); 2381ccd979bdSMark Fasheh 2382ccd979bdSMark Fasheh struct drop_lock_cb { 2383ccd979bdSMark Fasheh ocfs2_pre_drop_cb_t *drop_func; 2384ccd979bdSMark Fasheh void *drop_data; 2385ccd979bdSMark Fasheh }; 2386ccd979bdSMark Fasheh 2387ccd979bdSMark Fasheh static int ocfs2_drop_lock(struct ocfs2_super *osb, 2388ccd979bdSMark Fasheh struct ocfs2_lock_res *lockres, 2389ccd979bdSMark Fasheh struct drop_lock_cb *dcb) 2390ccd979bdSMark Fasheh { 2391ccd979bdSMark Fasheh enum dlm_status status; 2392ccd979bdSMark Fasheh unsigned long flags; 2393ccd979bdSMark Fasheh 2394ccd979bdSMark Fasheh /* We didn't get anywhere near actually using this lockres. */ 2395ccd979bdSMark Fasheh if (!(lockres->l_flags & OCFS2_LOCK_INITIALIZED)) 2396ccd979bdSMark Fasheh goto out; 2397ccd979bdSMark Fasheh 2398ccd979bdSMark Fasheh spin_lock_irqsave(&lockres->l_lock, flags); 2399ccd979bdSMark Fasheh 2400ccd979bdSMark Fasheh mlog_bug_on_msg(!(lockres->l_flags & OCFS2_LOCK_FREEING), 2401ccd979bdSMark Fasheh "lockres %s, flags 0x%lx\n", 2402ccd979bdSMark Fasheh lockres->l_name, lockres->l_flags); 2403ccd979bdSMark Fasheh 2404ccd979bdSMark Fasheh while (lockres->l_flags & OCFS2_LOCK_BUSY) { 2405ccd979bdSMark Fasheh mlog(0, "waiting on busy lock \"%s\": flags = %lx, action = " 2406ccd979bdSMark Fasheh "%u, unlock_action = %u\n", 2407ccd979bdSMark Fasheh lockres->l_name, lockres->l_flags, lockres->l_action, 2408ccd979bdSMark Fasheh lockres->l_unlock_action); 2409ccd979bdSMark Fasheh 2410ccd979bdSMark Fasheh spin_unlock_irqrestore(&lockres->l_lock, flags); 2411ccd979bdSMark Fasheh 2412ccd979bdSMark Fasheh /* XXX: Today we just wait on any busy 2413ccd979bdSMark Fasheh * locks... Perhaps we need to cancel converts in the 2414ccd979bdSMark Fasheh * future? */ 2415ccd979bdSMark Fasheh ocfs2_wait_on_busy_lock(lockres); 2416ccd979bdSMark Fasheh 2417ccd979bdSMark Fasheh spin_lock_irqsave(&lockres->l_lock, flags); 2418ccd979bdSMark Fasheh } 2419ccd979bdSMark Fasheh 2420ccd979bdSMark Fasheh if (dcb) 2421ccd979bdSMark Fasheh dcb->drop_func(lockres, dcb->drop_data); 2422ccd979bdSMark Fasheh 2423ccd979bdSMark Fasheh if (lockres->l_flags & OCFS2_LOCK_BUSY) 2424ccd979bdSMark Fasheh mlog(ML_ERROR, "destroying busy lock: \"%s\"\n", 2425ccd979bdSMark Fasheh lockres->l_name); 2426ccd979bdSMark Fasheh if (lockres->l_flags & OCFS2_LOCK_BLOCKED) 2427ccd979bdSMark Fasheh mlog(0, "destroying blocked lock: \"%s\"\n", lockres->l_name); 2428ccd979bdSMark Fasheh 2429ccd979bdSMark Fasheh if (!(lockres->l_flags & OCFS2_LOCK_ATTACHED)) { 2430ccd979bdSMark Fasheh spin_unlock_irqrestore(&lockres->l_lock, flags); 2431ccd979bdSMark Fasheh goto out; 2432ccd979bdSMark Fasheh } 2433ccd979bdSMark Fasheh 2434ccd979bdSMark Fasheh lockres_clear_flags(lockres, OCFS2_LOCK_ATTACHED); 2435ccd979bdSMark Fasheh 2436ccd979bdSMark Fasheh /* make sure we never get here while waiting for an ast to 2437ccd979bdSMark Fasheh * fire. */ 2438ccd979bdSMark Fasheh BUG_ON(lockres->l_action != OCFS2_AST_INVALID); 2439ccd979bdSMark Fasheh 2440ccd979bdSMark Fasheh /* is this necessary? */ 2441ccd979bdSMark Fasheh lockres_or_flags(lockres, OCFS2_LOCK_BUSY); 2442ccd979bdSMark Fasheh lockres->l_unlock_action = OCFS2_UNLOCK_DROP_LOCK; 2443ccd979bdSMark Fasheh spin_unlock_irqrestore(&lockres->l_lock, flags); 2444ccd979bdSMark Fasheh 2445ccd979bdSMark Fasheh mlog(0, "lock %s\n", lockres->l_name); 2446ccd979bdSMark Fasheh 2447ccd979bdSMark Fasheh status = dlmunlock(osb->dlm, &lockres->l_lksb, LKM_VALBLK, 2448ccd979bdSMark Fasheh lockres->l_ops->unlock_ast, lockres); 2449ccd979bdSMark Fasheh if (status != DLM_NORMAL) { 2450ccd979bdSMark Fasheh ocfs2_log_dlm_error("dlmunlock", status, lockres); 2451ccd979bdSMark Fasheh mlog(ML_ERROR, "lockres flags: %lu\n", lockres->l_flags); 2452ccd979bdSMark Fasheh dlm_print_one_lock(lockres->l_lksb.lockid); 2453ccd979bdSMark Fasheh BUG(); 2454ccd979bdSMark Fasheh } 2455ccd979bdSMark Fasheh mlog(0, "lock %s, successfull return from dlmunlock\n", 2456ccd979bdSMark Fasheh lockres->l_name); 2457ccd979bdSMark Fasheh 2458ccd979bdSMark Fasheh ocfs2_wait_on_busy_lock(lockres); 2459ccd979bdSMark Fasheh out: 2460ccd979bdSMark Fasheh mlog_exit(0); 2461ccd979bdSMark Fasheh return 0; 2462ccd979bdSMark Fasheh } 2463ccd979bdSMark Fasheh 2464ccd979bdSMark Fasheh /* Mark the lockres as being dropped. It will no longer be 2465ccd979bdSMark Fasheh * queued if blocking, but we still may have to wait on it 2466ccd979bdSMark Fasheh * being dequeued from the vote thread before we can consider 2467ccd979bdSMark Fasheh * it safe to drop. 2468ccd979bdSMark Fasheh * 2469ccd979bdSMark Fasheh * You can *not* attempt to call cluster_lock on this lockres anymore. */ 2470ccd979bdSMark Fasheh void ocfs2_mark_lockres_freeing(struct ocfs2_lock_res *lockres) 2471ccd979bdSMark Fasheh { 2472ccd979bdSMark Fasheh int status; 2473ccd979bdSMark Fasheh struct ocfs2_mask_waiter mw; 2474ccd979bdSMark Fasheh unsigned long flags; 2475ccd979bdSMark Fasheh 2476ccd979bdSMark Fasheh ocfs2_init_mask_waiter(&mw); 2477ccd979bdSMark Fasheh 2478ccd979bdSMark Fasheh spin_lock_irqsave(&lockres->l_lock, flags); 2479ccd979bdSMark Fasheh lockres->l_flags |= OCFS2_LOCK_FREEING; 2480ccd979bdSMark Fasheh while (lockres->l_flags & OCFS2_LOCK_QUEUED) { 2481ccd979bdSMark Fasheh lockres_add_mask_waiter(lockres, &mw, OCFS2_LOCK_QUEUED, 0); 2482ccd979bdSMark Fasheh spin_unlock_irqrestore(&lockres->l_lock, flags); 2483ccd979bdSMark Fasheh 2484ccd979bdSMark Fasheh mlog(0, "Waiting on lockres %s\n", lockres->l_name); 2485ccd979bdSMark Fasheh 2486ccd979bdSMark Fasheh status = ocfs2_wait_for_mask(&mw); 2487ccd979bdSMark Fasheh if (status) 2488ccd979bdSMark Fasheh mlog_errno(status); 2489ccd979bdSMark Fasheh 2490ccd979bdSMark Fasheh spin_lock_irqsave(&lockres->l_lock, flags); 2491ccd979bdSMark Fasheh } 2492ccd979bdSMark Fasheh spin_unlock_irqrestore(&lockres->l_lock, flags); 2493ccd979bdSMark Fasheh } 2494ccd979bdSMark Fasheh 2495d680efe9SMark Fasheh void ocfs2_simple_drop_lockres(struct ocfs2_super *osb, 2496d680efe9SMark Fasheh struct ocfs2_lock_res *lockres) 2497d680efe9SMark Fasheh { 2498d680efe9SMark Fasheh int ret; 2499d680efe9SMark Fasheh 2500d680efe9SMark Fasheh ocfs2_mark_lockres_freeing(lockres); 2501d680efe9SMark Fasheh ret = ocfs2_drop_lock(osb, lockres, NULL); 2502d680efe9SMark Fasheh if (ret) 2503d680efe9SMark Fasheh mlog_errno(ret); 2504d680efe9SMark Fasheh } 2505d680efe9SMark Fasheh 2506ccd979bdSMark Fasheh static void ocfs2_drop_osb_locks(struct ocfs2_super *osb) 2507ccd979bdSMark Fasheh { 2508d680efe9SMark Fasheh ocfs2_simple_drop_lockres(osb, &osb->osb_super_lockres); 2509d680efe9SMark Fasheh ocfs2_simple_drop_lockres(osb, &osb->osb_rename_lockres); 2510ccd979bdSMark Fasheh } 2511ccd979bdSMark Fasheh 2512ccd979bdSMark Fasheh static void ocfs2_meta_pre_drop(struct ocfs2_lock_res *lockres, void *data) 2513ccd979bdSMark Fasheh { 2514ccd979bdSMark Fasheh struct inode *inode = data; 2515ccd979bdSMark Fasheh 2516ccd979bdSMark Fasheh /* the metadata lock requires a bit more work as we have an 2517ccd979bdSMark Fasheh * LVB to worry about. */ 2518ccd979bdSMark Fasheh if (lockres->l_flags & OCFS2_LOCK_ATTACHED && 2519ccd979bdSMark Fasheh lockres->l_level == LKM_EXMODE && 2520ccd979bdSMark Fasheh !(lockres->l_flags & OCFS2_LOCK_NEEDS_REFRESH)) 2521ccd979bdSMark Fasheh __ocfs2_stuff_meta_lvb(inode); 2522ccd979bdSMark Fasheh } 2523ccd979bdSMark Fasheh 2524ccd979bdSMark Fasheh int ocfs2_drop_inode_locks(struct inode *inode) 2525ccd979bdSMark Fasheh { 2526ccd979bdSMark Fasheh int status, err; 2527ccd979bdSMark Fasheh struct drop_lock_cb meta_dcb = { ocfs2_meta_pre_drop, inode, }; 2528ccd979bdSMark Fasheh 2529ccd979bdSMark Fasheh mlog_entry_void(); 2530ccd979bdSMark Fasheh 2531ccd979bdSMark Fasheh /* No need to call ocfs2_mark_lockres_freeing here - 2532ccd979bdSMark Fasheh * ocfs2_clear_inode has done it for us. */ 2533ccd979bdSMark Fasheh 2534ccd979bdSMark Fasheh err = ocfs2_drop_lock(OCFS2_SB(inode->i_sb), 2535ccd979bdSMark Fasheh &OCFS2_I(inode)->ip_data_lockres, 2536ccd979bdSMark Fasheh NULL); 2537ccd979bdSMark Fasheh if (err < 0) 2538ccd979bdSMark Fasheh mlog_errno(err); 2539ccd979bdSMark Fasheh 2540ccd979bdSMark Fasheh status = err; 2541ccd979bdSMark Fasheh 2542ccd979bdSMark Fasheh err = ocfs2_drop_lock(OCFS2_SB(inode->i_sb), 2543ccd979bdSMark Fasheh &OCFS2_I(inode)->ip_meta_lockres, 2544ccd979bdSMark Fasheh &meta_dcb); 2545ccd979bdSMark Fasheh if (err < 0) 2546ccd979bdSMark Fasheh mlog_errno(err); 2547ccd979bdSMark Fasheh if (err < 0 && !status) 2548ccd979bdSMark Fasheh status = err; 2549ccd979bdSMark Fasheh 2550ccd979bdSMark Fasheh err = ocfs2_drop_lock(OCFS2_SB(inode->i_sb), 2551ccd979bdSMark Fasheh &OCFS2_I(inode)->ip_rw_lockres, 2552ccd979bdSMark Fasheh NULL); 2553ccd979bdSMark Fasheh if (err < 0) 2554ccd979bdSMark Fasheh mlog_errno(err); 2555ccd979bdSMark Fasheh if (err < 0 && !status) 2556ccd979bdSMark Fasheh status = err; 2557ccd979bdSMark Fasheh 2558ccd979bdSMark Fasheh mlog_exit(status); 2559ccd979bdSMark Fasheh return status; 2560ccd979bdSMark Fasheh } 2561ccd979bdSMark Fasheh 2562ccd979bdSMark Fasheh static void ocfs2_prepare_downconvert(struct ocfs2_lock_res *lockres, 2563ccd979bdSMark Fasheh int new_level) 2564ccd979bdSMark Fasheh { 2565ccd979bdSMark Fasheh assert_spin_locked(&lockres->l_lock); 2566ccd979bdSMark Fasheh 2567ccd979bdSMark Fasheh BUG_ON(lockres->l_blocking <= LKM_NLMODE); 2568ccd979bdSMark Fasheh 2569ccd979bdSMark Fasheh if (lockres->l_level <= new_level) { 2570ccd979bdSMark Fasheh mlog(ML_ERROR, "lockres->l_level (%u) <= new_level (%u)\n", 2571ccd979bdSMark Fasheh lockres->l_level, new_level); 2572ccd979bdSMark Fasheh BUG(); 2573ccd979bdSMark Fasheh } 2574ccd979bdSMark Fasheh 2575ccd979bdSMark Fasheh mlog(0, "lock %s, new_level = %d, l_blocking = %d\n", 2576ccd979bdSMark Fasheh lockres->l_name, new_level, lockres->l_blocking); 2577ccd979bdSMark Fasheh 2578ccd979bdSMark Fasheh lockres->l_action = OCFS2_AST_DOWNCONVERT; 2579ccd979bdSMark Fasheh lockres->l_requested = new_level; 2580ccd979bdSMark Fasheh lockres_or_flags(lockres, OCFS2_LOCK_BUSY); 2581ccd979bdSMark Fasheh } 2582ccd979bdSMark Fasheh 2583ccd979bdSMark Fasheh static int ocfs2_downconvert_lock(struct ocfs2_super *osb, 2584ccd979bdSMark Fasheh struct ocfs2_lock_res *lockres, 2585ccd979bdSMark Fasheh int new_level, 2586ccd979bdSMark Fasheh int lvb) 2587ccd979bdSMark Fasheh { 2588ccd979bdSMark Fasheh int ret, dlm_flags = LKM_CONVERT; 2589ccd979bdSMark Fasheh enum dlm_status status; 2590ccd979bdSMark Fasheh 2591ccd979bdSMark Fasheh mlog_entry_void(); 2592ccd979bdSMark Fasheh 2593ccd979bdSMark Fasheh if (lvb) 2594ccd979bdSMark Fasheh dlm_flags |= LKM_VALBLK; 2595ccd979bdSMark Fasheh 2596ccd979bdSMark Fasheh status = dlmlock(osb->dlm, 2597ccd979bdSMark Fasheh new_level, 2598ccd979bdSMark Fasheh &lockres->l_lksb, 2599ccd979bdSMark Fasheh dlm_flags, 2600ccd979bdSMark Fasheh lockres->l_name, 2601f0681062SMark Fasheh OCFS2_LOCK_ID_MAX_LEN - 1, 2602ccd979bdSMark Fasheh lockres->l_ops->ast, 2603ccd979bdSMark Fasheh lockres, 2604ccd979bdSMark Fasheh lockres->l_ops->bast); 2605ccd979bdSMark Fasheh if (status != DLM_NORMAL) { 2606ccd979bdSMark Fasheh ocfs2_log_dlm_error("dlmlock", status, lockres); 2607ccd979bdSMark Fasheh ret = -EINVAL; 2608ccd979bdSMark Fasheh ocfs2_recover_from_dlm_error(lockres, 1); 2609ccd979bdSMark Fasheh goto bail; 2610ccd979bdSMark Fasheh } 2611ccd979bdSMark Fasheh 2612ccd979bdSMark Fasheh ret = 0; 2613ccd979bdSMark Fasheh bail: 2614ccd979bdSMark Fasheh mlog_exit(ret); 2615ccd979bdSMark Fasheh return ret; 2616ccd979bdSMark Fasheh } 2617ccd979bdSMark Fasheh 2618ccd979bdSMark Fasheh /* returns 1 when the caller should unlock and call dlmunlock */ 2619ccd979bdSMark Fasheh static int ocfs2_prepare_cancel_convert(struct ocfs2_super *osb, 2620ccd979bdSMark Fasheh struct ocfs2_lock_res *lockres) 2621ccd979bdSMark Fasheh { 2622ccd979bdSMark Fasheh assert_spin_locked(&lockres->l_lock); 2623ccd979bdSMark Fasheh 2624ccd979bdSMark Fasheh mlog_entry_void(); 2625ccd979bdSMark Fasheh mlog(0, "lock %s\n", lockres->l_name); 2626ccd979bdSMark Fasheh 2627ccd979bdSMark Fasheh if (lockres->l_unlock_action == OCFS2_UNLOCK_CANCEL_CONVERT) { 2628ccd979bdSMark Fasheh /* If we're already trying to cancel a lock conversion 2629ccd979bdSMark Fasheh * then just drop the spinlock and allow the caller to 2630ccd979bdSMark Fasheh * requeue this lock. */ 2631ccd979bdSMark Fasheh 2632ccd979bdSMark Fasheh mlog(0, "Lockres %s, skip convert\n", lockres->l_name); 2633ccd979bdSMark Fasheh return 0; 2634ccd979bdSMark Fasheh } 2635ccd979bdSMark Fasheh 2636ccd979bdSMark Fasheh /* were we in a convert when we got the bast fire? */ 2637ccd979bdSMark Fasheh BUG_ON(lockres->l_action != OCFS2_AST_CONVERT && 2638ccd979bdSMark Fasheh lockres->l_action != OCFS2_AST_DOWNCONVERT); 2639ccd979bdSMark Fasheh /* set things up for the unlockast to know to just 2640ccd979bdSMark Fasheh * clear out the ast_action and unset busy, etc. */ 2641ccd979bdSMark Fasheh lockres->l_unlock_action = OCFS2_UNLOCK_CANCEL_CONVERT; 2642ccd979bdSMark Fasheh 2643ccd979bdSMark Fasheh mlog_bug_on_msg(!(lockres->l_flags & OCFS2_LOCK_BUSY), 2644ccd979bdSMark Fasheh "lock %s, invalid flags: 0x%lx\n", 2645ccd979bdSMark Fasheh lockres->l_name, lockres->l_flags); 2646ccd979bdSMark Fasheh 2647ccd979bdSMark Fasheh return 1; 2648ccd979bdSMark Fasheh } 2649ccd979bdSMark Fasheh 2650ccd979bdSMark Fasheh static int ocfs2_cancel_convert(struct ocfs2_super *osb, 2651ccd979bdSMark Fasheh struct ocfs2_lock_res *lockres) 2652ccd979bdSMark Fasheh { 2653ccd979bdSMark Fasheh int ret; 2654ccd979bdSMark Fasheh enum dlm_status status; 2655ccd979bdSMark Fasheh 2656ccd979bdSMark Fasheh mlog_entry_void(); 2657ccd979bdSMark Fasheh mlog(0, "lock %s\n", lockres->l_name); 2658ccd979bdSMark Fasheh 2659ccd979bdSMark Fasheh ret = 0; 2660ccd979bdSMark Fasheh status = dlmunlock(osb->dlm, 2661ccd979bdSMark Fasheh &lockres->l_lksb, 2662ccd979bdSMark Fasheh LKM_CANCEL, 2663ccd979bdSMark Fasheh lockres->l_ops->unlock_ast, 2664ccd979bdSMark Fasheh lockres); 2665ccd979bdSMark Fasheh if (status != DLM_NORMAL) { 2666ccd979bdSMark Fasheh ocfs2_log_dlm_error("dlmunlock", status, lockres); 2667ccd979bdSMark Fasheh ret = -EINVAL; 2668ccd979bdSMark Fasheh ocfs2_recover_from_dlm_error(lockres, 0); 2669ccd979bdSMark Fasheh } 2670ccd979bdSMark Fasheh 2671ccd979bdSMark Fasheh mlog(0, "lock %s return from dlmunlock\n", lockres->l_name); 2672ccd979bdSMark Fasheh 2673ccd979bdSMark Fasheh mlog_exit(ret); 2674ccd979bdSMark Fasheh return ret; 2675ccd979bdSMark Fasheh } 2676ccd979bdSMark Fasheh 2677ccd979bdSMark Fasheh static inline int ocfs2_can_downconvert_meta_lock(struct inode *inode, 2678ccd979bdSMark Fasheh struct ocfs2_lock_res *lockres, 2679ccd979bdSMark Fasheh int new_level) 2680ccd979bdSMark Fasheh { 2681ccd979bdSMark Fasheh int ret; 2682ccd979bdSMark Fasheh 2683ccd979bdSMark Fasheh mlog_entry_void(); 2684ccd979bdSMark Fasheh 2685ccd979bdSMark Fasheh BUG_ON(new_level != LKM_NLMODE && new_level != LKM_PRMODE); 2686ccd979bdSMark Fasheh 2687ccd979bdSMark Fasheh if (lockres->l_flags & OCFS2_LOCK_REFRESHING) { 2688ccd979bdSMark Fasheh ret = 0; 2689ccd979bdSMark Fasheh mlog(0, "lockres %s currently being refreshed -- backing " 2690ccd979bdSMark Fasheh "off!\n", lockres->l_name); 2691ccd979bdSMark Fasheh } else if (new_level == LKM_PRMODE) 2692ccd979bdSMark Fasheh ret = !lockres->l_ex_holders && 2693ccd979bdSMark Fasheh ocfs2_inode_fully_checkpointed(inode); 2694ccd979bdSMark Fasheh else /* Must be NLMODE we're converting to. */ 2695ccd979bdSMark Fasheh ret = !lockres->l_ro_holders && !lockres->l_ex_holders && 2696ccd979bdSMark Fasheh ocfs2_inode_fully_checkpointed(inode); 2697ccd979bdSMark Fasheh 2698ccd979bdSMark Fasheh mlog_exit(ret); 2699ccd979bdSMark Fasheh return ret; 2700ccd979bdSMark Fasheh } 2701ccd979bdSMark Fasheh 2702ccd979bdSMark Fasheh static int ocfs2_do_unblock_meta(struct inode *inode, 2703ccd979bdSMark Fasheh int *requeue) 2704ccd979bdSMark Fasheh { 2705ccd979bdSMark Fasheh int new_level; 2706ccd979bdSMark Fasheh int set_lvb = 0; 2707ccd979bdSMark Fasheh int ret = 0; 2708ccd979bdSMark Fasheh struct ocfs2_lock_res *lockres = &OCFS2_I(inode)->ip_meta_lockres; 2709ccd979bdSMark Fasheh unsigned long flags; 2710ccd979bdSMark Fasheh 2711ccd979bdSMark Fasheh struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); 2712ccd979bdSMark Fasheh 2713ccd979bdSMark Fasheh mlog_entry_void(); 2714ccd979bdSMark Fasheh 2715ccd979bdSMark Fasheh spin_lock_irqsave(&lockres->l_lock, flags); 2716ccd979bdSMark Fasheh 2717ccd979bdSMark Fasheh BUG_ON(!(lockres->l_flags & OCFS2_LOCK_BLOCKED)); 2718ccd979bdSMark Fasheh 2719ccd979bdSMark Fasheh mlog(0, "l_level=%d, l_blocking=%d\n", lockres->l_level, 2720ccd979bdSMark Fasheh lockres->l_blocking); 2721ccd979bdSMark Fasheh 2722ccd979bdSMark Fasheh BUG_ON(lockres->l_level != LKM_EXMODE && 2723ccd979bdSMark Fasheh lockres->l_level != LKM_PRMODE); 2724ccd979bdSMark Fasheh 2725ccd979bdSMark Fasheh if (lockres->l_flags & OCFS2_LOCK_BUSY) { 2726ccd979bdSMark Fasheh *requeue = 1; 2727ccd979bdSMark Fasheh ret = ocfs2_prepare_cancel_convert(osb, lockres); 2728ccd979bdSMark Fasheh spin_unlock_irqrestore(&lockres->l_lock, flags); 2729ccd979bdSMark Fasheh if (ret) { 2730ccd979bdSMark Fasheh ret = ocfs2_cancel_convert(osb, lockres); 2731ccd979bdSMark Fasheh if (ret < 0) 2732ccd979bdSMark Fasheh mlog_errno(ret); 2733ccd979bdSMark Fasheh } 2734ccd979bdSMark Fasheh goto leave; 2735ccd979bdSMark Fasheh } 2736ccd979bdSMark Fasheh 2737ccd979bdSMark Fasheh new_level = ocfs2_highest_compat_lock_level(lockres->l_blocking); 2738ccd979bdSMark Fasheh 2739ccd979bdSMark Fasheh mlog(0, "l_level=%d, l_blocking=%d, new_level=%d\n", 2740ccd979bdSMark Fasheh lockres->l_level, lockres->l_blocking, new_level); 2741ccd979bdSMark Fasheh 2742ccd979bdSMark Fasheh if (ocfs2_can_downconvert_meta_lock(inode, lockres, new_level)) { 2743ccd979bdSMark Fasheh if (lockres->l_level == LKM_EXMODE) 2744ccd979bdSMark Fasheh set_lvb = 1; 2745ccd979bdSMark Fasheh 2746ccd979bdSMark Fasheh /* If the lock hasn't been refreshed yet (rare), then 2747ccd979bdSMark Fasheh * our memory inode values are old and we skip 2748ccd979bdSMark Fasheh * stuffing the lvb. There's no need to actually clear 2749ccd979bdSMark Fasheh * out the lvb here as it's value is still valid. */ 2750ccd979bdSMark Fasheh if (!(lockres->l_flags & OCFS2_LOCK_NEEDS_REFRESH)) { 2751ccd979bdSMark Fasheh if (set_lvb) 2752ccd979bdSMark Fasheh __ocfs2_stuff_meta_lvb(inode); 2753ccd979bdSMark Fasheh } else 2754ccd979bdSMark Fasheh mlog(0, "lockres %s: downconverting stale lock!\n", 2755ccd979bdSMark Fasheh lockres->l_name); 2756ccd979bdSMark Fasheh 2757ccd979bdSMark Fasheh mlog(0, "calling ocfs2_downconvert_lock with l_level=%d, " 2758ccd979bdSMark Fasheh "l_blocking=%d, new_level=%d\n", 2759ccd979bdSMark Fasheh lockres->l_level, lockres->l_blocking, new_level); 2760ccd979bdSMark Fasheh 2761ccd979bdSMark Fasheh ocfs2_prepare_downconvert(lockres, new_level); 2762ccd979bdSMark Fasheh spin_unlock_irqrestore(&lockres->l_lock, flags); 2763ccd979bdSMark Fasheh ret = ocfs2_downconvert_lock(osb, lockres, new_level, set_lvb); 2764ccd979bdSMark Fasheh goto leave; 2765ccd979bdSMark Fasheh } 2766ccd979bdSMark Fasheh if (!ocfs2_inode_fully_checkpointed(inode)) 2767ccd979bdSMark Fasheh ocfs2_start_checkpoint(osb); 2768ccd979bdSMark Fasheh 2769ccd979bdSMark Fasheh *requeue = 1; 2770ccd979bdSMark Fasheh spin_unlock_irqrestore(&lockres->l_lock, flags); 2771ccd979bdSMark Fasheh ret = 0; 2772ccd979bdSMark Fasheh leave: 2773ccd979bdSMark Fasheh mlog_exit(ret); 2774ccd979bdSMark Fasheh return ret; 2775ccd979bdSMark Fasheh } 2776ccd979bdSMark Fasheh 2777ccd979bdSMark Fasheh static int ocfs2_generic_unblock_lock(struct ocfs2_super *osb, 2778ccd979bdSMark Fasheh struct ocfs2_lock_res *lockres, 2779d680efe9SMark Fasheh struct ocfs2_unblock_ctl *ctl, 2780ccd979bdSMark Fasheh ocfs2_convert_worker_t *worker) 2781ccd979bdSMark Fasheh { 2782ccd979bdSMark Fasheh unsigned long flags; 2783ccd979bdSMark Fasheh int blocking; 2784ccd979bdSMark Fasheh int new_level; 2785ccd979bdSMark Fasheh int ret = 0; 2786ccd979bdSMark Fasheh 2787ccd979bdSMark Fasheh mlog_entry_void(); 2788ccd979bdSMark Fasheh 2789ccd979bdSMark Fasheh spin_lock_irqsave(&lockres->l_lock, flags); 2790ccd979bdSMark Fasheh 2791ccd979bdSMark Fasheh BUG_ON(!(lockres->l_flags & OCFS2_LOCK_BLOCKED)); 2792ccd979bdSMark Fasheh 2793ccd979bdSMark Fasheh recheck: 2794ccd979bdSMark Fasheh if (lockres->l_flags & OCFS2_LOCK_BUSY) { 2795d680efe9SMark Fasheh ctl->requeue = 1; 2796ccd979bdSMark Fasheh ret = ocfs2_prepare_cancel_convert(osb, lockres); 2797ccd979bdSMark Fasheh spin_unlock_irqrestore(&lockres->l_lock, flags); 2798ccd979bdSMark Fasheh if (ret) { 2799ccd979bdSMark Fasheh ret = ocfs2_cancel_convert(osb, lockres); 2800ccd979bdSMark Fasheh if (ret < 0) 2801ccd979bdSMark Fasheh mlog_errno(ret); 2802ccd979bdSMark Fasheh } 2803ccd979bdSMark Fasheh goto leave; 2804ccd979bdSMark Fasheh } 2805ccd979bdSMark Fasheh 2806ccd979bdSMark Fasheh /* if we're blocking an exclusive and we have *any* holders, 2807ccd979bdSMark Fasheh * then requeue. */ 2808ccd979bdSMark Fasheh if ((lockres->l_blocking == LKM_EXMODE) 2809ccd979bdSMark Fasheh && (lockres->l_ex_holders || lockres->l_ro_holders)) { 2810ccd979bdSMark Fasheh spin_unlock_irqrestore(&lockres->l_lock, flags); 2811d680efe9SMark Fasheh ctl->requeue = 1; 2812ccd979bdSMark Fasheh ret = 0; 2813ccd979bdSMark Fasheh goto leave; 2814ccd979bdSMark Fasheh } 2815ccd979bdSMark Fasheh 2816ccd979bdSMark Fasheh /* If it's a PR we're blocking, then only 2817ccd979bdSMark Fasheh * requeue if we've got any EX holders */ 2818ccd979bdSMark Fasheh if (lockres->l_blocking == LKM_PRMODE && 2819ccd979bdSMark Fasheh lockres->l_ex_holders) { 2820ccd979bdSMark Fasheh spin_unlock_irqrestore(&lockres->l_lock, flags); 2821d680efe9SMark Fasheh ctl->requeue = 1; 2822ccd979bdSMark Fasheh ret = 0; 2823ccd979bdSMark Fasheh goto leave; 2824ccd979bdSMark Fasheh } 2825ccd979bdSMark Fasheh 2826ccd979bdSMark Fasheh /* If we get here, then we know that there are no more 2827ccd979bdSMark Fasheh * incompatible holders (and anyone asking for an incompatible 2828ccd979bdSMark Fasheh * lock is blocked). We can now downconvert the lock */ 2829ccd979bdSMark Fasheh if (!worker) 2830ccd979bdSMark Fasheh goto downconvert; 2831ccd979bdSMark Fasheh 2832ccd979bdSMark Fasheh /* Some lockres types want to do a bit of work before 2833ccd979bdSMark Fasheh * downconverting a lock. Allow that here. The worker function 2834ccd979bdSMark Fasheh * may sleep, so we save off a copy of what we're blocking as 2835ccd979bdSMark Fasheh * it may change while we're not holding the spin lock. */ 2836ccd979bdSMark Fasheh blocking = lockres->l_blocking; 2837ccd979bdSMark Fasheh spin_unlock_irqrestore(&lockres->l_lock, flags); 2838ccd979bdSMark Fasheh 2839d680efe9SMark Fasheh ctl->unblock_action = worker(lockres, blocking); 2840d680efe9SMark Fasheh 2841d680efe9SMark Fasheh if (ctl->unblock_action == UNBLOCK_STOP_POST) 2842d680efe9SMark Fasheh goto leave; 2843ccd979bdSMark Fasheh 2844ccd979bdSMark Fasheh spin_lock_irqsave(&lockres->l_lock, flags); 2845ccd979bdSMark Fasheh if (blocking != lockres->l_blocking) { 2846ccd979bdSMark Fasheh /* If this changed underneath us, then we can't drop 2847ccd979bdSMark Fasheh * it just yet. */ 2848ccd979bdSMark Fasheh goto recheck; 2849ccd979bdSMark Fasheh } 2850ccd979bdSMark Fasheh 2851ccd979bdSMark Fasheh downconvert: 2852d680efe9SMark Fasheh ctl->requeue = 0; 2853ccd979bdSMark Fasheh new_level = ocfs2_highest_compat_lock_level(lockres->l_blocking); 2854ccd979bdSMark Fasheh 2855ccd979bdSMark Fasheh ocfs2_prepare_downconvert(lockres, new_level); 2856ccd979bdSMark Fasheh spin_unlock_irqrestore(&lockres->l_lock, flags); 2857ccd979bdSMark Fasheh ret = ocfs2_downconvert_lock(osb, lockres, new_level, 0); 2858ccd979bdSMark Fasheh leave: 2859ccd979bdSMark Fasheh mlog_exit(ret); 2860ccd979bdSMark Fasheh return ret; 2861ccd979bdSMark Fasheh } 2862ccd979bdSMark Fasheh 2863d680efe9SMark Fasheh static int ocfs2_data_convert_worker(struct ocfs2_lock_res *lockres, 2864ccd979bdSMark Fasheh int blocking) 2865ccd979bdSMark Fasheh { 2866ccd979bdSMark Fasheh struct inode *inode; 2867ccd979bdSMark Fasheh struct address_space *mapping; 2868ccd979bdSMark Fasheh 2869ccd979bdSMark Fasheh inode = ocfs2_lock_res_inode(lockres); 2870ccd979bdSMark Fasheh mapping = inode->i_mapping; 2871ccd979bdSMark Fasheh 2872ccd979bdSMark Fasheh if (filemap_fdatawrite(mapping)) { 2873b0697053SMark Fasheh mlog(ML_ERROR, "Could not sync inode %llu for downconvert!", 2874b0697053SMark Fasheh (unsigned long long)OCFS2_I(inode)->ip_blkno); 2875ccd979bdSMark Fasheh } 2876ccd979bdSMark Fasheh sync_mapping_buffers(mapping); 2877ccd979bdSMark Fasheh if (blocking == LKM_EXMODE) { 2878ccd979bdSMark Fasheh truncate_inode_pages(mapping, 0); 2879ccd979bdSMark Fasheh unmap_mapping_range(mapping, 0, 0, 0); 2880ccd979bdSMark Fasheh } else { 2881ccd979bdSMark Fasheh /* We only need to wait on the I/O if we're not also 2882ccd979bdSMark Fasheh * truncating pages because truncate_inode_pages waits 2883ccd979bdSMark Fasheh * for us above. We don't truncate pages if we're 2884ccd979bdSMark Fasheh * blocking anything < EXMODE because we want to keep 2885ccd979bdSMark Fasheh * them around in that case. */ 2886ccd979bdSMark Fasheh filemap_fdatawait(mapping); 2887ccd979bdSMark Fasheh } 2888ccd979bdSMark Fasheh 2889d680efe9SMark Fasheh return UNBLOCK_CONTINUE; 2890ccd979bdSMark Fasheh } 2891ccd979bdSMark Fasheh 2892ccd979bdSMark Fasheh int ocfs2_unblock_data(struct ocfs2_lock_res *lockres, 2893d680efe9SMark Fasheh struct ocfs2_unblock_ctl *ctl) 2894ccd979bdSMark Fasheh { 2895ccd979bdSMark Fasheh int status; 2896ccd979bdSMark Fasheh struct inode *inode; 2897ccd979bdSMark Fasheh struct ocfs2_super *osb; 2898ccd979bdSMark Fasheh 2899ccd979bdSMark Fasheh mlog_entry_void(); 2900ccd979bdSMark Fasheh 2901ccd979bdSMark Fasheh inode = ocfs2_lock_res_inode(lockres); 2902ccd979bdSMark Fasheh osb = OCFS2_SB(inode->i_sb); 2903ccd979bdSMark Fasheh 2904b0697053SMark Fasheh mlog(0, "unblock inode %llu\n", 2905b0697053SMark Fasheh (unsigned long long)OCFS2_I(inode)->ip_blkno); 2906ccd979bdSMark Fasheh 2907d680efe9SMark Fasheh status = ocfs2_generic_unblock_lock(osb, lockres, ctl, 2908ccd979bdSMark Fasheh ocfs2_data_convert_worker); 2909ccd979bdSMark Fasheh if (status < 0) 2910ccd979bdSMark Fasheh mlog_errno(status); 2911ccd979bdSMark Fasheh 2912b0697053SMark Fasheh mlog(0, "inode %llu, requeue = %d\n", 2913d680efe9SMark Fasheh (unsigned long long)OCFS2_I(inode)->ip_blkno, ctl->requeue); 2914ccd979bdSMark Fasheh 2915ccd979bdSMark Fasheh mlog_exit(status); 2916ccd979bdSMark Fasheh return status; 2917ccd979bdSMark Fasheh } 2918ccd979bdSMark Fasheh 2919ccd979bdSMark Fasheh static int ocfs2_unblock_inode_lock(struct ocfs2_lock_res *lockres, 2920d680efe9SMark Fasheh struct ocfs2_unblock_ctl *ctl) 2921ccd979bdSMark Fasheh { 2922ccd979bdSMark Fasheh int status; 2923ccd979bdSMark Fasheh struct inode *inode; 2924ccd979bdSMark Fasheh 2925ccd979bdSMark Fasheh mlog_entry_void(); 2926ccd979bdSMark Fasheh 2927ccd979bdSMark Fasheh mlog(0, "Unblock lockres %s\n", lockres->l_name); 2928ccd979bdSMark Fasheh 2929ccd979bdSMark Fasheh inode = ocfs2_lock_res_inode(lockres); 2930ccd979bdSMark Fasheh 2931ccd979bdSMark Fasheh status = ocfs2_generic_unblock_lock(OCFS2_SB(inode->i_sb), 2932d680efe9SMark Fasheh lockres, ctl, NULL); 2933ccd979bdSMark Fasheh if (status < 0) 2934ccd979bdSMark Fasheh mlog_errno(status); 2935ccd979bdSMark Fasheh 2936ccd979bdSMark Fasheh mlog_exit(status); 2937ccd979bdSMark Fasheh return status; 2938ccd979bdSMark Fasheh } 2939ccd979bdSMark Fasheh 2940d680efe9SMark Fasheh static int ocfs2_unblock_meta(struct ocfs2_lock_res *lockres, 2941d680efe9SMark Fasheh struct ocfs2_unblock_ctl *ctl) 2942ccd979bdSMark Fasheh { 2943ccd979bdSMark Fasheh int status; 2944ccd979bdSMark Fasheh struct inode *inode; 2945ccd979bdSMark Fasheh 2946ccd979bdSMark Fasheh mlog_entry_void(); 2947ccd979bdSMark Fasheh 2948ccd979bdSMark Fasheh inode = ocfs2_lock_res_inode(lockres); 2949ccd979bdSMark Fasheh 2950b0697053SMark Fasheh mlog(0, "unblock inode %llu\n", 2951b0697053SMark Fasheh (unsigned long long)OCFS2_I(inode)->ip_blkno); 2952ccd979bdSMark Fasheh 2953d680efe9SMark Fasheh status = ocfs2_do_unblock_meta(inode, &ctl->requeue); 2954ccd979bdSMark Fasheh if (status < 0) 2955ccd979bdSMark Fasheh mlog_errno(status); 2956ccd979bdSMark Fasheh 2957b0697053SMark Fasheh mlog(0, "inode %llu, requeue = %d\n", 2958d680efe9SMark Fasheh (unsigned long long)OCFS2_I(inode)->ip_blkno, ctl->requeue); 2959ccd979bdSMark Fasheh 2960ccd979bdSMark Fasheh mlog_exit(status); 2961ccd979bdSMark Fasheh return status; 2962ccd979bdSMark Fasheh } 2963ccd979bdSMark Fasheh 2964d680efe9SMark Fasheh /* 2965d680efe9SMark Fasheh * Does the final reference drop on our dentry lock. Right now this 2966d680efe9SMark Fasheh * happens in the vote thread, but we could choose to simplify the 2967d680efe9SMark Fasheh * dlmglue API and push these off to the ocfs2_wq in the future. 2968d680efe9SMark Fasheh */ 2969d680efe9SMark Fasheh static void ocfs2_dentry_post_unlock(struct ocfs2_super *osb, 2970d680efe9SMark Fasheh struct ocfs2_lock_res *lockres) 2971d680efe9SMark Fasheh { 2972d680efe9SMark Fasheh struct ocfs2_dentry_lock *dl = ocfs2_lock_res_dl(lockres); 2973d680efe9SMark Fasheh ocfs2_dentry_lock_put(osb, dl); 2974d680efe9SMark Fasheh } 2975d680efe9SMark Fasheh 2976d680efe9SMark Fasheh /* 2977d680efe9SMark Fasheh * d_delete() matching dentries before the lock downconvert. 2978d680efe9SMark Fasheh * 2979d680efe9SMark Fasheh * At this point, any process waiting to destroy the 2980d680efe9SMark Fasheh * dentry_lock due to last ref count is stopped by the 2981d680efe9SMark Fasheh * OCFS2_LOCK_QUEUED flag. 2982d680efe9SMark Fasheh * 2983d680efe9SMark Fasheh * We have two potential problems 2984d680efe9SMark Fasheh * 2985d680efe9SMark Fasheh * 1) If we do the last reference drop on our dentry_lock (via dput) 2986d680efe9SMark Fasheh * we'll wind up in ocfs2_release_dentry_lock(), waiting on 2987d680efe9SMark Fasheh * the downconvert to finish. Instead we take an elevated 2988d680efe9SMark Fasheh * reference and push the drop until after we've completed our 2989d680efe9SMark Fasheh * unblock processing. 2990d680efe9SMark Fasheh * 2991d680efe9SMark Fasheh * 2) There might be another process with a final reference, 2992d680efe9SMark Fasheh * waiting on us to finish processing. If this is the case, we 2993d680efe9SMark Fasheh * detect it and exit out - there's no more dentries anyway. 2994d680efe9SMark Fasheh */ 2995d680efe9SMark Fasheh static int ocfs2_dentry_convert_worker(struct ocfs2_lock_res *lockres, 2996d680efe9SMark Fasheh int blocking) 2997d680efe9SMark Fasheh { 2998d680efe9SMark Fasheh struct ocfs2_dentry_lock *dl = ocfs2_lock_res_dl(lockres); 2999d680efe9SMark Fasheh struct ocfs2_inode_info *oi = OCFS2_I(dl->dl_inode); 3000d680efe9SMark Fasheh struct dentry *dentry; 3001d680efe9SMark Fasheh unsigned long flags; 3002d680efe9SMark Fasheh int extra_ref = 0; 3003d680efe9SMark Fasheh 3004d680efe9SMark Fasheh /* 3005d680efe9SMark Fasheh * This node is blocking another node from getting a read 3006d680efe9SMark Fasheh * lock. This happens when we've renamed within a 3007d680efe9SMark Fasheh * directory. We've forced the other nodes to d_delete(), but 3008d680efe9SMark Fasheh * we never actually dropped our lock because it's still 3009d680efe9SMark Fasheh * valid. The downconvert code will retain a PR for this node, 3010d680efe9SMark Fasheh * so there's no further work to do. 3011d680efe9SMark Fasheh */ 3012d680efe9SMark Fasheh if (blocking == LKM_PRMODE) 3013d680efe9SMark Fasheh return UNBLOCK_CONTINUE; 3014d680efe9SMark Fasheh 3015d680efe9SMark Fasheh /* 3016d680efe9SMark Fasheh * Mark this inode as potentially orphaned. The code in 3017d680efe9SMark Fasheh * ocfs2_delete_inode() will figure out whether it actually 3018d680efe9SMark Fasheh * needs to be freed or not. 3019d680efe9SMark Fasheh */ 3020d680efe9SMark Fasheh spin_lock(&oi->ip_lock); 3021d680efe9SMark Fasheh oi->ip_flags |= OCFS2_INODE_MAYBE_ORPHANED; 3022d680efe9SMark Fasheh spin_unlock(&oi->ip_lock); 3023d680efe9SMark Fasheh 3024d680efe9SMark Fasheh /* 3025d680efe9SMark Fasheh * Yuck. We need to make sure however that the check of 3026d680efe9SMark Fasheh * OCFS2_LOCK_FREEING and the extra reference are atomic with 3027d680efe9SMark Fasheh * respect to a reference decrement or the setting of that 3028d680efe9SMark Fasheh * flag. 3029d680efe9SMark Fasheh */ 3030d680efe9SMark Fasheh spin_lock_irqsave(&lockres->l_lock, flags); 3031d680efe9SMark Fasheh spin_lock(&dentry_attach_lock); 3032d680efe9SMark Fasheh if (!(lockres->l_flags & OCFS2_LOCK_FREEING) 3033d680efe9SMark Fasheh && dl->dl_count) { 3034d680efe9SMark Fasheh dl->dl_count++; 3035d680efe9SMark Fasheh extra_ref = 1; 3036d680efe9SMark Fasheh } 3037d680efe9SMark Fasheh spin_unlock(&dentry_attach_lock); 3038d680efe9SMark Fasheh spin_unlock_irqrestore(&lockres->l_lock, flags); 3039d680efe9SMark Fasheh 3040d680efe9SMark Fasheh mlog(0, "extra_ref = %d\n", extra_ref); 3041d680efe9SMark Fasheh 3042d680efe9SMark Fasheh /* 3043d680efe9SMark Fasheh * We have a process waiting on us in ocfs2_dentry_iput(), 3044d680efe9SMark Fasheh * which means we can't have any more outstanding 3045d680efe9SMark Fasheh * aliases. There's no need to do any more work. 3046d680efe9SMark Fasheh */ 3047d680efe9SMark Fasheh if (!extra_ref) 3048d680efe9SMark Fasheh return UNBLOCK_CONTINUE; 3049d680efe9SMark Fasheh 3050d680efe9SMark Fasheh spin_lock(&dentry_attach_lock); 3051d680efe9SMark Fasheh while (1) { 3052d680efe9SMark Fasheh dentry = ocfs2_find_local_alias(dl->dl_inode, 3053d680efe9SMark Fasheh dl->dl_parent_blkno, 1); 3054d680efe9SMark Fasheh if (!dentry) 3055d680efe9SMark Fasheh break; 3056d680efe9SMark Fasheh spin_unlock(&dentry_attach_lock); 3057d680efe9SMark Fasheh 3058d680efe9SMark Fasheh mlog(0, "d_delete(%.*s);\n", dentry->d_name.len, 3059d680efe9SMark Fasheh dentry->d_name.name); 3060d680efe9SMark Fasheh 3061d680efe9SMark Fasheh /* 3062d680efe9SMark Fasheh * The following dcache calls may do an 3063d680efe9SMark Fasheh * iput(). Normally we don't want that from the 3064d680efe9SMark Fasheh * downconverting thread, but in this case it's ok 3065d680efe9SMark Fasheh * because the requesting node already has an 3066d680efe9SMark Fasheh * exclusive lock on the inode, so it can't be queued 3067d680efe9SMark Fasheh * for a downconvert. 3068d680efe9SMark Fasheh */ 3069d680efe9SMark Fasheh d_delete(dentry); 3070d680efe9SMark Fasheh dput(dentry); 3071d680efe9SMark Fasheh 3072d680efe9SMark Fasheh spin_lock(&dentry_attach_lock); 3073d680efe9SMark Fasheh } 3074d680efe9SMark Fasheh spin_unlock(&dentry_attach_lock); 3075d680efe9SMark Fasheh 3076d680efe9SMark Fasheh /* 3077d680efe9SMark Fasheh * If we are the last holder of this dentry lock, there is no 3078d680efe9SMark Fasheh * reason to downconvert so skip straight to the unlock. 3079d680efe9SMark Fasheh */ 3080d680efe9SMark Fasheh if (dl->dl_count == 1) 3081d680efe9SMark Fasheh return UNBLOCK_STOP_POST; 3082d680efe9SMark Fasheh 3083d680efe9SMark Fasheh return UNBLOCK_CONTINUE_POST; 3084d680efe9SMark Fasheh } 3085d680efe9SMark Fasheh 3086d680efe9SMark Fasheh static int ocfs2_unblock_dentry_lock(struct ocfs2_lock_res *lockres, 3087d680efe9SMark Fasheh struct ocfs2_unblock_ctl *ctl) 3088d680efe9SMark Fasheh { 3089d680efe9SMark Fasheh int ret; 3090d680efe9SMark Fasheh struct ocfs2_dentry_lock *dl = ocfs2_lock_res_dl(lockres); 3091d680efe9SMark Fasheh struct ocfs2_super *osb = OCFS2_SB(dl->dl_inode->i_sb); 3092d680efe9SMark Fasheh 3093d680efe9SMark Fasheh mlog(0, "unblock dentry lock: %llu\n", 3094d680efe9SMark Fasheh (unsigned long long)OCFS2_I(dl->dl_inode)->ip_blkno); 3095d680efe9SMark Fasheh 3096d680efe9SMark Fasheh ret = ocfs2_generic_unblock_lock(osb, 3097d680efe9SMark Fasheh lockres, 3098d680efe9SMark Fasheh ctl, 3099d680efe9SMark Fasheh ocfs2_dentry_convert_worker); 3100d680efe9SMark Fasheh if (ret < 0) 3101d680efe9SMark Fasheh mlog_errno(ret); 3102d680efe9SMark Fasheh 3103d680efe9SMark Fasheh mlog(0, "requeue = %d, post = %d\n", ctl->requeue, ctl->unblock_action); 3104d680efe9SMark Fasheh 3105d680efe9SMark Fasheh return ret; 3106d680efe9SMark Fasheh } 3107d680efe9SMark Fasheh 3108ccd979bdSMark Fasheh /* Generic unblock function for any lockres whose private data is an 3109ccd979bdSMark Fasheh * ocfs2_super pointer. */ 3110ccd979bdSMark Fasheh static int ocfs2_unblock_osb_lock(struct ocfs2_lock_res *lockres, 3111d680efe9SMark Fasheh struct ocfs2_unblock_ctl *ctl) 3112ccd979bdSMark Fasheh { 3113ccd979bdSMark Fasheh int status; 3114ccd979bdSMark Fasheh struct ocfs2_super *osb; 3115ccd979bdSMark Fasheh 3116ccd979bdSMark Fasheh mlog_entry_void(); 3117ccd979bdSMark Fasheh 3118ccd979bdSMark Fasheh mlog(0, "Unblock lockres %s\n", lockres->l_name); 3119ccd979bdSMark Fasheh 3120ccd979bdSMark Fasheh osb = ocfs2_lock_res_super(lockres); 3121ccd979bdSMark Fasheh 3122ccd979bdSMark Fasheh status = ocfs2_generic_unblock_lock(osb, 3123ccd979bdSMark Fasheh lockres, 3124d680efe9SMark Fasheh ctl, 3125ccd979bdSMark Fasheh NULL); 3126ccd979bdSMark Fasheh if (status < 0) 3127ccd979bdSMark Fasheh mlog_errno(status); 3128ccd979bdSMark Fasheh 3129ccd979bdSMark Fasheh mlog_exit(status); 3130ccd979bdSMark Fasheh return status; 3131ccd979bdSMark Fasheh } 3132ccd979bdSMark Fasheh 3133ccd979bdSMark Fasheh void ocfs2_process_blocked_lock(struct ocfs2_super *osb, 3134ccd979bdSMark Fasheh struct ocfs2_lock_res *lockres) 3135ccd979bdSMark Fasheh { 3136ccd979bdSMark Fasheh int status; 3137d680efe9SMark Fasheh struct ocfs2_unblock_ctl ctl = {0, 0,}; 3138ccd979bdSMark Fasheh unsigned long flags; 3139ccd979bdSMark Fasheh 3140ccd979bdSMark Fasheh /* Our reference to the lockres in this function can be 3141ccd979bdSMark Fasheh * considered valid until we remove the OCFS2_LOCK_QUEUED 3142ccd979bdSMark Fasheh * flag. */ 3143ccd979bdSMark Fasheh 3144ccd979bdSMark Fasheh mlog_entry_void(); 3145ccd979bdSMark Fasheh 3146ccd979bdSMark Fasheh BUG_ON(!lockres); 3147ccd979bdSMark Fasheh BUG_ON(!lockres->l_ops); 3148ccd979bdSMark Fasheh BUG_ON(!lockres->l_ops->unblock); 3149ccd979bdSMark Fasheh 3150ccd979bdSMark Fasheh mlog(0, "lockres %s blocked.\n", lockres->l_name); 3151ccd979bdSMark Fasheh 3152ccd979bdSMark Fasheh /* Detect whether a lock has been marked as going away while 3153ccd979bdSMark Fasheh * the vote thread was processing other things. A lock can 3154ccd979bdSMark Fasheh * still be marked with OCFS2_LOCK_FREEING after this check, 3155ccd979bdSMark Fasheh * but short circuiting here will still save us some 3156ccd979bdSMark Fasheh * performance. */ 3157ccd979bdSMark Fasheh spin_lock_irqsave(&lockres->l_lock, flags); 3158ccd979bdSMark Fasheh if (lockres->l_flags & OCFS2_LOCK_FREEING) 3159ccd979bdSMark Fasheh goto unqueue; 3160ccd979bdSMark Fasheh spin_unlock_irqrestore(&lockres->l_lock, flags); 3161ccd979bdSMark Fasheh 3162d680efe9SMark Fasheh status = lockres->l_ops->unblock(lockres, &ctl); 3163ccd979bdSMark Fasheh if (status < 0) 3164ccd979bdSMark Fasheh mlog_errno(status); 3165ccd979bdSMark Fasheh 3166ccd979bdSMark Fasheh spin_lock_irqsave(&lockres->l_lock, flags); 3167ccd979bdSMark Fasheh unqueue: 3168d680efe9SMark Fasheh if (lockres->l_flags & OCFS2_LOCK_FREEING || !ctl.requeue) { 3169ccd979bdSMark Fasheh lockres_clear_flags(lockres, OCFS2_LOCK_QUEUED); 3170ccd979bdSMark Fasheh } else 3171ccd979bdSMark Fasheh ocfs2_schedule_blocked_lock(osb, lockres); 3172ccd979bdSMark Fasheh 3173ccd979bdSMark Fasheh mlog(0, "lockres %s, requeue = %s.\n", lockres->l_name, 3174d680efe9SMark Fasheh ctl.requeue ? "yes" : "no"); 3175ccd979bdSMark Fasheh spin_unlock_irqrestore(&lockres->l_lock, flags); 3176ccd979bdSMark Fasheh 3177d680efe9SMark Fasheh if (ctl.unblock_action != UNBLOCK_CONTINUE 3178d680efe9SMark Fasheh && lockres->l_ops->post_unlock) 3179d680efe9SMark Fasheh lockres->l_ops->post_unlock(osb, lockres); 3180d680efe9SMark Fasheh 3181ccd979bdSMark Fasheh mlog_exit_void(); 3182ccd979bdSMark Fasheh } 3183ccd979bdSMark Fasheh 3184ccd979bdSMark Fasheh static void ocfs2_schedule_blocked_lock(struct ocfs2_super *osb, 3185ccd979bdSMark Fasheh struct ocfs2_lock_res *lockres) 3186ccd979bdSMark Fasheh { 3187ccd979bdSMark Fasheh mlog_entry_void(); 3188ccd979bdSMark Fasheh 3189ccd979bdSMark Fasheh assert_spin_locked(&lockres->l_lock); 3190ccd979bdSMark Fasheh 3191ccd979bdSMark Fasheh if (lockres->l_flags & OCFS2_LOCK_FREEING) { 3192ccd979bdSMark Fasheh /* Do not schedule a lock for downconvert when it's on 3193ccd979bdSMark Fasheh * the way to destruction - any nodes wanting access 3194ccd979bdSMark Fasheh * to the resource will get it soon. */ 3195ccd979bdSMark Fasheh mlog(0, "Lockres %s won't be scheduled: flags 0x%lx\n", 3196ccd979bdSMark Fasheh lockres->l_name, lockres->l_flags); 3197ccd979bdSMark Fasheh return; 3198ccd979bdSMark Fasheh } 3199ccd979bdSMark Fasheh 3200ccd979bdSMark Fasheh lockres_or_flags(lockres, OCFS2_LOCK_QUEUED); 3201ccd979bdSMark Fasheh 3202ccd979bdSMark Fasheh spin_lock(&osb->vote_task_lock); 3203ccd979bdSMark Fasheh if (list_empty(&lockres->l_blocked_list)) { 3204ccd979bdSMark Fasheh list_add_tail(&lockres->l_blocked_list, 3205ccd979bdSMark Fasheh &osb->blocked_lock_list); 3206ccd979bdSMark Fasheh osb->blocked_lock_count++; 3207ccd979bdSMark Fasheh } 3208ccd979bdSMark Fasheh spin_unlock(&osb->vote_task_lock); 3209ccd979bdSMark Fasheh 3210ccd979bdSMark Fasheh mlog_exit_void(); 3211ccd979bdSMark Fasheh } 3212ccd979bdSMark Fasheh 3213ccd979bdSMark Fasheh /* This aids in debugging situations where a bad LVB might be involved. */ 3214ccd979bdSMark Fasheh void ocfs2_dump_meta_lvb_info(u64 level, 3215ccd979bdSMark Fasheh const char *function, 3216ccd979bdSMark Fasheh unsigned int line, 3217ccd979bdSMark Fasheh struct ocfs2_lock_res *lockres) 3218ccd979bdSMark Fasheh { 3219ccd979bdSMark Fasheh struct ocfs2_meta_lvb *lvb = (struct ocfs2_meta_lvb *) lockres->l_lksb.lvb; 3220ccd979bdSMark Fasheh 3221ccd979bdSMark Fasheh mlog(level, "LVB information for %s (called from %s:%u):\n", 3222ccd979bdSMark Fasheh lockres->l_name, function, line); 3223f9e2d82eSMark Fasheh mlog(level, "version: %u, clusters: %u, generation: 0x%x\n", 3224f9e2d82eSMark Fasheh lvb->lvb_version, be32_to_cpu(lvb->lvb_iclusters), 3225f9e2d82eSMark Fasheh be32_to_cpu(lvb->lvb_igeneration)); 3226b0697053SMark Fasheh mlog(level, "size: %llu, uid %u, gid %u, mode 0x%x\n", 3227b0697053SMark Fasheh (unsigned long long)be64_to_cpu(lvb->lvb_isize), 3228b0697053SMark Fasheh be32_to_cpu(lvb->lvb_iuid), be32_to_cpu(lvb->lvb_igid), 3229b0697053SMark Fasheh be16_to_cpu(lvb->lvb_imode)); 3230b0697053SMark Fasheh mlog(level, "nlink %u, atime_packed 0x%llx, ctime_packed 0x%llx, " 3231ca4d147eSHerbert Poetzl "mtime_packed 0x%llx iattr 0x%x\n", be16_to_cpu(lvb->lvb_inlink), 3232b0697053SMark Fasheh (long long)be64_to_cpu(lvb->lvb_iatime_packed), 3233b0697053SMark Fasheh (long long)be64_to_cpu(lvb->lvb_ictime_packed), 3234ca4d147eSHerbert Poetzl (long long)be64_to_cpu(lvb->lvb_imtime_packed), 3235ca4d147eSHerbert Poetzl be32_to_cpu(lvb->lvb_iattr)); 3236ccd979bdSMark Fasheh } 3237